0026-1742 0026-1742 S0026-17422014000200045 México México Mexico 00 04 2014 00 04 2014 57 2 45 52 2347-64 2007 356 7 7 663-75 2010 73 25-30 2010 8 197-203 2010 12 92-102 2007 8th