1405-5546 1405-5546 S1405-55462020000401369 10.13053/cys-24-4-3233 Mexico Mexico 00 12 2020 00 12 2020 24 4 1369 1385

1 2008 103 482 482 890-1 2 2013 3 2014 6 6 6 386-92 4 2009 5 2003 6 1987 15 15 131-6 7 1986 14 96-108 8 MEPSYD 2002 9 2001 10 2008 70 13-22