Hilkhuysen G L M, Oudhoff J P, Rietberg M, van der Wal G, Timmermans D R M
Department of Social Medicine, Institute for Research in Extramural Medicine, VU University Medical Centre, Van der Boechorststraat 7, 1081 BT Amsterdam, The Netherlands.
Public Health. 2005 Apr;119(4):290-3. doi: 10.1016/j.puhe.2004.05.020.