Authors: H E de Walle; K M van der Pal; L T de Jong-van den Berg; W Jeeninga; J S Schouten; C M de Rover; S E Buitendijk; M C Cornel Journal: BMJ Date: 1999-07-31
Authors: J Rolschau; K Kristoffersen; M Ulrich; P Grinsted; E Schaumburg; N Foged Journal: Eur J Obstet Gynecol Reprod Biol Date: 1999-12 Impact factor: 2.435
Authors: A Rosano; D Smithells; L Cacciani; B Botting; E Castilla; M Cornel; D Erickson; J Goujard; L Irgens; P Merlob; E Robert; C Siffel; C Stoll; Y Sumiyoshi Journal: J Epidemiol Community Health Date: 1999-10 Impact factor: 3.710