1683-9803 1683-9803 S1683-98032018000300237 10.31698/ped.45032018008 Mexico Mexico Mexico 00 12 2018 00 12 2018 45 3 237 241

1 2000 117 650-6 2 Veras-Hernández MA et al 2017 44 62-70 3 2015 6 Suppl 1 Suppl 1 S289-93 4 2015 90 4 4 146-9 5 2004 9 403-9 6 2016 170 10 10 2611-6 7 2018 76 5 5 933-8 8 2015 23 3 3 210-8 9 2014 6 5 5 114-7