Authors: Rob T van Strien; Laurens P Koopman; Marjan Kerkhof; Jack Spithoven; Johan C de Jongste; Jorrit Gerritsen; Herman J Neijens; Rob C Aalberse; Henriette A Smit; Bert Brunekreef Journal: Environ Health Perspect Date: 2002-11 Impact factor: 9.031