1817-7433 1817-7433 S1817-74332021000100088 10.51581/rccm.v24i1.349 Perú 00 00 2021 00 00 2021 24 1 88 89 1 2020 9 2 2 65-76 2 2021 6 02 02 1-8 3 2021 1-6 4 2021 7 1 1 5 2021 6 2020 37 37 393-7