1727-897X 1727-897X S1727-897X2020000100007 Cuba Cuba 00 02 2020 00 02 2020 18 1 7 9 1 1997 2 INFOMED 2004 96 5 3 2006 4 1999 12 1 1 7 5 2007 5 3 3 4 6 2015 13 5 5 2