1012-2966 1012-2966 S1012-29662022000200182 10.47993/gmb.v45i2.540 Bolivia 00 00 2022 00 00 2022 45 2 182 184

1 2017 44 5 5 366-9 2 2010 39 3 3 330-6 3 2015 13 142 4 2018 75 5 5 276-82 5 2014 23 1 1 9-17 6 2008 109 2 2 206-12 7 2004 7 2 2