0036-3634 0036-3634 S0036-36342021000200159 10.21149/12218 Mexico Mexico 00 04 2021 00 04 2021 63 2 159 160 Secretaría de Salud 2018 2020 00 1-20 2020 14 4 4 303-10 2020 37 4 4 176-80 2020 8 1 1