2079-3480 2079-3480 S2079-34802018000100057 Ecuador Cuba Cuba 00 03 2018 00 03 2018 52 1 57 66

2014 8 1 1 96-101 2008 42 2 2 181-4 2013 2011 16 3 3 2668-77 2012 2 3 3 27-35 2015 99 1 1 107-13 1955 11 1 2008 18 1 1 51-8 1993 24 3 3 217-21 1998 23-82 2015 13 2 2 49-56 2012 7 7 981-9 2012 19 1 1 37-41 2017 2 1 1 245-7 2010 42 1 1 57-65 National Research Council (NRC) 2012 Eleventh Revised Edition 2014 60 4 4 140‒146 2011 10 53 53 1-7 2003 26 1 1 31-6 2015 1 3 3 177-83