0036-3634 0036-3634 S0036-36342020000600872 10.21149/11465 Mexico Mexico Mexico Mexico Mexico Mexico Spain Ecuador 00 12 2020 00 12 2020 62 6 872 873 2015 34 4 4 339-45 Instituto de Diagnóstico y Referencia Epidemiológicos 2015 2014 32 4 4 292-8