1028-9933 1028-9933 S1028-99332020000600515 Cuba Cuba 00 12 2020 00 12 2020 99 6 515 517 1 2020 99 3 3 200-8 2 2020 45 1 1 3 2014 24 4 4 226-34 4 2016 7 2 2 5 2008 13 1 1 178-94