1683-9803 1683-9803 S1683-98032021000200092 10.31698/ped.48022021001 Paraguay Paraguay 00 08 2021 00 08 2021 48 2 92 94 1 2008 37 7 7 538-45 2 2013 496 7446 7446 504-7 3 2005 3 1 1 13-22 4 1998 11 3 3 480-96 5 2003 3 1 1 19-28 6 2011 39 Suppl 4 Suppl 4 3-11 7 2012 87 4 4 584-93 8 1997 9 1997 50 3-4 3-4 161-9 10 2008 22 53-72 11 2007 2 2 2 248-73 12 Organización Panamericana de la Salud 2021 13 2007 21 1 1 55-63 14 2017 7 336