0034-8376 0034-8376 S0034-83762021000200061 10.24875/ric.20000569 Mexico USA Mexico Mexico Mexico Canada 00 04 2021 00 04 2021 73 2 61 64 1 2020 383 120-8 2 2020 3 2020 202 690-9 4 2014 7 236-50 5 2020 202 1037-9