<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2664-0902</journal-id>
<journal-title><![CDATA[Alfa Revista de Investigación en Ciencias Agronómicas y Veterinaria]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Inv. Cs. Agro. y Vet.]]></abbrev-journal-title>
<issn>2664-0902</issn>
<publisher>
<publisher-name><![CDATA[CET-BOLIVIA]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2664-09022024000300870</article-id>
<article-id pub-id-type="doi">10.33996/revistaalfa.v8i24.310</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Sólidos totales disueltos en agua superficial para consumo humano en San Juan de Pillo, Perú]]></article-title>
<article-title xml:lang="en"><![CDATA[Total dissolved solids in surface water for human consumption in San Juan de Pillo, Peru]]></article-title>
<article-title xml:lang="pt"><![CDATA[Sólidos totais dissolvidos em água superficial para consumo humano em San Juan de Pillo, Peru]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chavarría Márquez]]></surname>
<given-names><![CDATA[Esmila Yeime]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Huamani Astocaza]]></surname>
<given-names><![CDATA[Luz Luisa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cusiche Huamaní]]></surname>
<given-names><![CDATA[Mery Luz]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Huamán]]></surname>
<given-names><![CDATA[Wilfredo Sáez]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Angeles Suazo]]></surname>
<given-names><![CDATA[Julio Miguel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Basurto Contreras]]></surname>
<given-names><![CDATA[César Marino]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Pampas  ]]></institution>
<addr-line><![CDATA[Pampas ]]></addr-line>
<country>Peru</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2024</year>
</pub-date>
<volume>8</volume>
<numero>24</numero>
<fpage>870</fpage>
<lpage>881</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_arttext&amp;pid=S2664-09022024000300870&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_abstract&amp;pid=S2664-09022024000300870&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_pdf&amp;pid=S2664-09022024000300870&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El monitoreo de los sólidos disueltos totales (TDS) en el agua es crucial para asegurar su calidad, especialmente en fuentes destinadas al consumo humano. Esta investigación se centró en determinar las concentraciones de TDS en el agua utilizada por la comunidad de San Juan de Pillo, Acraquia. Se llevó a cabo un estudio cuantitativo con diseño de campo, recolectando muestras de un canal de riego en dos periodos de 2024: enero, con mayor caudal, y abril, con menor caudal. Se realizaron 12 muestreos en tres horarios diferentes cada semana durante cuatro semanas. Los resultados se analizaron utilizando la prueba de hipótesis "t" de Student, encontrando diferencias significativas en los niveles de TDS entre los meses estudiados. Estos hallazgos subrayan la necesidad de un monitoreo continuo para garantizar el acceso a agua potable segura, ya que las concentraciones de TDS no cumplen con los estándares del decreto supremo 004-2017 del Ministerio del Ambiente del Perú.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The monitoring of total dissolved solids (TDS) in water is crucial to ensure its quality, especially in sources intended for human consumption. This research focused on determining TDS concentrations in the water used by the community of San Juan de Pillo, Acraquia. A quantitative study was conducted with a field design, collecting samples from an irrigation canal during two periods in 2024: January, with higher flow, and April, with lower flow. Twelve samples were taken at three different times each week over four weeks. The results were analyzed using Student's "t" hypothesis test, revealing significant differences in TDS levels between the studied months. These findings underscore the need for continuous monitoring to ensure access to safe drinking water, as TDS concentrations do not meet the standards of Supreme Decree 004-2017 from the Ministry of Environment of Peru.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[RESUMO O monitoramento dos sólidos dissolvidos totais (TDS) na água é crucial para garantir sua qualidade, especialmente em fontes destinadas ao consumo humano. Esta pesquisa concentrou-se em determinar as concentrações de TDS na água utilizada pela comunidade de San Juan de Pillo, Acraquia. Um estudo quantitativo foi realizado com um desenho de campo, coletando amostras de um canal de irrigação durante dois períodos em 2024: janeiro, com maior fluxo, e abril, com menor fluxo. Doze amostras foram coletadas em três horários diferentes a cada semana durante quatro semanas. Os resultados foram analisados usando o teste de hipótese "t" de Student, revelando diferenças significativas nos níveis de TDS entre os meses estudados. Esses achados ressaltam a necessidade de monitoramento contínuo para garantir o acesso a água potável segura, uma vez que as concentrações de TDS não atendem aos padrões do Decreto Supremo 004-2017 do Ministério do Meio Ambiente do Peru.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Aguas superficiales]]></kwd>
<kwd lng="es"><![CDATA[Calidad del agua]]></kwd>
<kwd lng="es"><![CDATA[Estándares ambientales]]></kwd>
<kwd lng="es"><![CDATA[Monitoreo]]></kwd>
<kwd lng="es"><![CDATA[Sólidos disueltos totales (TDS)]]></kwd>
<kwd lng="en"><![CDATA[Environmental standards]]></kwd>
<kwd lng="en"><![CDATA[Monitoring]]></kwd>
<kwd lng="en"><![CDATA[Surface water]]></kwd>
<kwd lng="en"><![CDATA[Total dissolved solids (TDS)]]></kwd>
<kwd lng="en"><![CDATA[Water quality]]></kwd>
<kwd lng="pt"><![CDATA[Águas superficiais]]></kwd>
<kwd lng="pt"><![CDATA[Qualidade da água]]></kwd>
<kwd lng="pt"><![CDATA[Padrões ambientais]]></kwd>
<kwd lng="pt"><![CDATA[Monitoramento]]></kwd>
<kwd lng="pt"><![CDATA[Sólidos dissolvidos totais (TDS)]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="">
<collab>UNESCO/ONU</collab>
<source><![CDATA[UNESCO]]></source>
<year>2023</year>
</nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<collab>UNESCO</collab>
<article-title xml:lang=""><![CDATA[Rapport mondial des Nations Unies sur la mise en valeur des ressources en eau 2024: l&#8217;eau pour la prospérité et la paix.]]></article-title>
<source><![CDATA[UNESCO]]></source>
<year>2024</year>
<volume>4822</volume>
<page-range>3</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Alarcón-Hincapié]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Zafra-Mejía]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Echeverri-Prieto]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Cambio climático y recursos hídricos en Colombia.]]></article-title>
<source><![CDATA[Rev UDCA Actual Divulg Científica]]></source>
<year>2019</year>
<volume>2</volume>
<page-range>2</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lifeng]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[United Nations.]]></article-title>
<source><![CDATA[United Nations]]></source>
<year>2023</year>
</nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Nunez]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<source><![CDATA[National Geographic]]></source>
<year>2011</year>
</nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hernández]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<source><![CDATA[MICROLAB industrial]]></source>
<year>2015</year>
</nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Butler]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Ford]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Evaluating relationships between total dissolved solids (TDS) and total suspended solids (TSS) in a mining-influenced watershed.]]></article-title>
<source><![CDATA[Mine Water Environ]]></source>
<year>2018</year>
<volume>3</volume>
<page-range>7</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ferdous]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Rahman]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Ghosh]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Detection of Total Dissolved Solids from Landsat 8 OLI Image in Coastal Bangladesh.]]></article-title>
<source><![CDATA[Proc Int Conf Clim Change]]></source>
<year>2019</year>
<volume>3</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>35-44</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Miranda]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Krishnakumar]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Microalgal diversity in relation to the physicochemical parameters of some Industrial sites in Mangalore, South India.]]></article-title>
<source><![CDATA[Environ Monit Assess]]></source>
<year>2015</year>
<volume>187</volume>
<numero>11</numero>
<issue>11</issue>
<page-range>664</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Adjovu]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Stephen]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Ahmad]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Spatial and Temporal Dynamics of Key Water Quality Parameters in a Thermal Stratified Lake Ecosystem: The Case Study of Lake Mead.]]></article-title>
<source><![CDATA[Earth]]></source>
<year>2023</year>
<volume>4</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>461-502</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cheng]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Zhang]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Shi]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Kung]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[What is the relationship between land use and surface water quality? A review and prospects from remote sensing perspective.]]></article-title>
<source><![CDATA[Environ Sci Pollut Res Int]]></source>
<year>2022</year>
<volume>2</volume>
<page-range>9</page-range></nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sória]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Tavares]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Pinto]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Stumpf]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Zarnott]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Bubolz]]></surname>
<given-names><![CDATA[J,]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Evaluation of physicochemical water parameters in watersheds of southern Brazil.]]></article-title>
<source><![CDATA[Rev Ambiente Água]]></source>
<year>2020</year>
<volume>1</volume>
<page-range>5</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Adjovu]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Stephen]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[James]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Ahmad]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Measurement of Total Dissolved Solids and Total Suspended Solids in Water Systems: A Review of the Issues, Conventional, and Remote Sensing Techniques.]]></article-title>
<source><![CDATA[Remote Sens]]></source>
<year>2023</year>
<volume>15</volume>
<numero>14</numero>
<issue>14</issue>
<page-range>3534</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Baird]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Bridgewater]]></surname>
<given-names><![CDATA[L. American Public Health Association]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[American Water Works Association.]]></article-title>
<source><![CDATA[Water Environment Federation]]></source>
<year>2017</year>
<volume>5752209</volume>
<page-range>1</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="">
<collab>Ministerio de Salud Lima-Perú.</collab>
<source><![CDATA[Reglamento de la Calidad del Agua para Consumo Humano.pdf. J.B. GRAFIC E.I.R.L.;]]></source>
<year>2011</year>
</nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Merriam]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Strager]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Petty]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Source water vulnerability to elevated total dissolved solids within a mixed-use Appalachian River basin.]]></article-title>
<source><![CDATA[PLOS Water]]></source>
<year>2022</year>
</nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fong]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[Colpas]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Severiche]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Evaluación de la precisión y exactitud para la determinación gravimétrica de sólidos disueltos totales en aguas.]]></article-title>
<source><![CDATA[Cienc E Ing Rev Investig Interdiscip En Biodivers Desarro Sosten Cienc Tecnol E Innov Procesos Product Ind]]></source>
<year>2015</year>
<volume>2</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>4</page-range></nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sigler]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[Bauder]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Alcalinidad, pH, y Sólidos Disueltos Totales.]]></article-title>
<source><![CDATA[Universidad Estatal de Montana]]></source>
<year>2020</year>
</nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chuquimia]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Valdez]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Choque]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Quintanilla]]></surname>
<given-names><![CDATA[J,]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Calidad del agua en el río Ichalaya, su relación con los drenajes de bocaminas de Mina Matilde, municipio Carabuco.]]></article-title>
<source><![CDATA[Rev Boliv Quím]]></source>
<year>2023</year>
<volume>40</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>9-20</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Misman]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Sharif]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Chowdhury]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Azizan]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
</person-group>
<source><![CDATA[Water pollution and the assessment of water quality parameters: a review. Desalination Water Treat.]]></source>
<year>2023</year>
<page-range>79-88</page-range></nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kaushal]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Likens]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Pace]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Utz]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Haq]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Gorman]]></surname>
<given-names><![CDATA[J,]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Freshwater salinization syndrome on a continental scale.]]></article-title>
<source><![CDATA[Proc Natl Acad Sci]]></source>
<year>2018</year>
<volume>11</volume>
<page-range>5</page-range></nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sibanda]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Chigor]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
<name>
<surname><![CDATA[Koba]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Obi]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Okoh]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Characterisation of the physicochemical qualities of a typical rural-based river: ecological and public health implications.]]></article-title>
<source><![CDATA[Int J Environ Sci Technol]]></source>
<year>2014</year>
<volume>11</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>1771-80</page-range></nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Zhang]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Zhang]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[Huang]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Gao]]></surname>
<given-names><![CDATA[X]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Analysing the correlations of long-term seasonal water quality parameters, suspended solids and total dissolved solids in a shallow reservoir with meteorological factors.]]></article-title>
<source><![CDATA[Environ Sci Pollut Res Int]]></source>
<year>2017</year>
<volume>24</volume>
<numero>7</numero>
<issue>7</issue>
<page-range>6746-56</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
