1561-3194 1561-3194 S1561-31942019000600947 Cuba Cuba 00 12 2019 00 12 2019 23 6 947 953

1 2016 2 2013 3 2009 4 2017 5 9 9 5 2014 6 2015 7 2016 8 2014 27 2 2 283-93 9 2010 10 2014 20 1 1