0001-6002 0001-6002 S0001-60022018000400172 Costa Rica Costa Rica Costa Rica 00 12 2018 00 12 2018 60 4 172 181

1 2011 58 21 21 2241-7 2 Samoukovic G and Tchervenkov C 2010 13 26-34 3 2008 56 13 13 1-9 4 Garne E and a European Surveillance of Congenital Anomalies Working Group 2011 123 841-9 5 Pilote L and Marelli A 2010 56 1149-57 6 Houyel L et al 2012 98 22 22 1667-73 7 2011 8 50-60 8 2013 1463-93 9 2001 85 468-33 10 2009 21 37-48 11 2007 116 1876-8 12 Instituto Nacional de Estadística y Censos 13 Umaña Solís L y Romero Zúñiga JJ 2011 30 1 1 31-8 14 2013 34 5 5 304-11 15 Landry L et al 2009 107 5 5 417-22 16 1995 67 1 1 235-9 17 Ortiz G y Ortejo G 2013 149 617-23 18 2016 11 3 3 19 2014 148 596-602 20 Shin M and Correa A 2013 131 1502-8 21 Mosley B and Hobbs C 2003 67 662-8 22 To T and Dodds L 2006 76 46-54 23 2016 11 160-8 24 Bythell M and Rankin J 2010 375 649-56 25 2017 26 Simpson LL and Williams IA 2013 34 597-605 27 Ricci M and Bull C 2006 92 1298-302 28 Kogon B and Oster M 2014 113 1041-4 29 O´Donnell CP.Kamlin CO.Davis PG.Carlin JB.Morley CJ 2007 92 F465-7 30 1990 80 F43-5 31 2008 121 4 4 751-7 32 Ng B and Hokanson J 2010 5 292-6 33 2012 379 2459-64