0034-7523 0034-7523 S0034-75232021000200022 Cuba 00 06 2021 00 06 2021 60 2

1 2019 32 3 3 191 2 2016 91 7 7 946-54 3 2019 83 2 2 77-86 4 2016 6 3 3 5 2012 106 6 6 6 2018 20