[1] Univ Ulster, EUROCAT WHO Collaborating Ctr Surveillance Congeni, Coleraine, Londonderry, North Ireland
[2] Queens Univ Belfast, Sch Nursing & Midwifery, Belfast, Antrim, North Ireland
[3] CHU Vaudois, Div Med Genet, Lausanne, Switzerland
[4] Registro Anomalias Congenitas CAV Subdirecc Salud, San Sebastian, Spain
[5] Univ Zagreb, Childrens Hosp Zagreb, Sch Med, Zagreb, Croatia
[6] CNR, Inst Clin Physiol, Via Moruzzi, Pisa, Italy
[7] Natl Publ Hlth & Med Officer Serv, Hungarian Congenital Abnormal Registry, Budapest, Hungary
[8] Univ Groningen, Univ Med Ctr Groningen, Dept Genet, Groningen, Netherlands
[9] Registo Nacl Anomalias Congenitas, Dept Epidemiol, Av Padre Cruz, Lisbon, Portugal
[10] Univ Leicester, Dept Epidemiol Publ Hlth, East Midlands & South Yorkshire EMSYCAR, Leicester, Leics, England
[11] Dept Hlth Informat & Res, Guardamangia, Malta
[12] Hosp Lillebaelt, Dept Paediat, Kolding, Denmark
[13] Med Univ Graz, Dept Obstet & Gynecol, Graz, Austria
[14] Lund Univ, Inst Clin Sci, Swedish Natl Board Hlth & Welf, Lund, Sweden
[15] Lund Univ, Inst Clin Sci, Dept Reprod Epidemiol, Lund, Sweden
[16] Univ Med Sci, Dept Med Genet, Poznan, Poland
[17] Hlth Serv Execut, Dublin, Ireland
[18] Hlth Serv Execut, Kilkenny, Ireland
[19] PIH, Dept Environm, Antwerp, Province Of Ant, Belgium
[20] Univ Ferrara Corso Giovecca, Azienda Osped, Ferrara, Italy
[21] Hlth Serv Execut, Cork, Ireland
[22] Johannes Gutenberg Univ Mainz, Childrens Hosp Univ Med Ctr, Birth Registry Mainz Model, Mainz, Germany
[23] Ctr Hosp Univ, Register Reunion Isl, St Pierre La Reunion, Reunion, France
[24] Newcastle Univ, Inst Hlth & Soc, Newcastle Upon Tyne, Tyne & Wear, England
[25] Otto von Guericke Univ, Med Fac, Malformat Monitoring Ctr, Magdeburg, Germany
[26] Natl Inst Welf & Hlth THL, Helsinki, Finland
[27] Univ Oxford, Natl Perinatal Epidemiol Unit, Oxford, England
[28] Pubf Hlth Wales, Congenital Anomaly Register & Informat Serv Wales, Swansea, W Glam, Wales
[29] IPG, Ctr Genet Humaine, Ave G Lemaitre, Charleroi, Belgium
[30] Univ Southampton, Fac Med, Southampton, Hants, England
[31] Wessex Clin Genet Serv, Southampton, Hants, England
[32] Univ Bristol, Sch Clin Sci, Bristol, Avon, England
[33] Khmelnytsky Perinatal Ctr, OMNI Net Ukraine Birth Defects Program, Khmelnytsky, Ukraine