R Greenlees, A Neville, M–C Addor, E Amar, L Arriola, M Bakker, I Barisic, PA. Boyd, E Calzolari, B Doray, E Draper, S E Vollset, E Garne, M Gatt, M Haeusler, K Kallen, B Khoshnood, A Latos–Bielenska, MLnMartinez–Frias, A Materna–Kiryluk, C M Dias, B McDonnell, C Mullaney, V Nelen, M O'Mahony, A Pierini, A Queisser–Luft, H Randrianaivo–Ranjatoélina, J Rankin, A Rissmann, A Ritvanen, J Salvador, A Sipek, D Tucker, C Verellen–Dumoulin, D Wellesley and W Wertelecki. Paper 6: EUROCAT member registries: Organization and activities Birth Defects research Part A: Volume 91, Issue S1, March 2011, Pages: S51–S100