1665-5044 1665-5044 S1665-50442020000300080 10.24875/rmn.m20000079 Mexico Mexico Mexico Mexico 00 06 2020 00 06 2020 21 3 80 81 1 2020 395 497-506 2 2020 3 2020 382 1708-20 4 2020 5 2020 6 2020 7 2020 8 2020 11 995-8 9 2020 92 552-5 10 2020 12 8 11