1683-9803 1683-9803 S1683-98032018000300201 10.31698/ped.45032018002 Paraguay Paraguay Paraguay 00 12 2018 00 12 2018 45 3 201 205

1 2016 35 507-10 2 2013 17 672-81 3 2002 38 290-4 4 2018 45 1 1 17-24 5 2005 40 1785-91 6 2007 26 398-405 7 2004 89 4 4 F331-5 8 2010 108 311-7 9 2017 196 856-63 10 2017 22 218-26 11 2011 16 276-80 12 2014 25 914-8 13 Ortellado de Canese J 2018 50 151-6