1817-7433 1817-7433 S1817-74332022000100004 10.51581/rccm.v25i1.461 Bolivia Bolivia Bolivia 00 09 2022 00 09 2022 25 1 4 5 1 2019 41 6 6 1533-49 2 2013 2-3 3 2020 156 523-6 4 2015 5 2014 13 5 5 274-7