Khoury, Muin J.; Botto, Lorenzo; Mastroiacovo, Pierpaolo; Skjaerven, Rolv; Castilla, Eduardo; Erickson, J. David; Khoury Muin J.; Birth Defects and Genetic Diseases Branch, National Center for Environmental Health, Centers for Disease Control and Prevention; Botto Lorenzo; Italian Multicentric Register of Congenital Malformations, Clinica Pediatrica, Universita Cattolica; Mastroiacovo Pierpaolo; Italian Multicentric Register of Congenital Malformations, Clinica Pediatrica, Universita Cattolica; Skjaerven Rolv; Section for Medical Informatics and Statistics, University of Bergen, Haukeland Hospital; Castilla Eduardo; Latin-American Collaborative Study of Congenital Malformations (ECLAMC)/Genetica; Erickson J. David; Birth Defects and Genetic Diseases Branch, National Center for Environmental Health, Centers for Disease Control and Prevention