1990-8644 1990-8644 S1990-86442021000200328 Ecuador 00 04 2021 00 04 2021 17 79 328 333

2010 2018 2015 6 2 2 77-87 2010 48 4 4 19-20 2006 37 9 9 517-21 2015 54 1 1 18-23 2008 139 19-24 2016 9 3 3 253-8 2016 27 2 2 123-33 2013 21 1 1 113-35 2008 20 1 1 11-25 2012 11 17 17 1011-20 2001 44 1 1 35-7 2015 2015 2019 2008 5 1 1 17-26 USA. National Institutes of Health 2013 2016