1608-8921 1608-8921 S1608-89212020000200001 Cuba Cuba 00 08 2020 00 08 2020 22 2 1 5 1 2017 54 1 1 37-46 2 2010 51 1 1 121-9 3 2017 11 2 2 10-8 4 Cenetec-Salud 2014 5 2016 36 3 3 195-6 6 2015 148 3 3 547-55 7 2016 46 3 3 246-64