Journal article (2003) - A. Havelaar (author), AA van den Bogaard (author), H. der Zee (author), R.M. Cooke (author), E. Evers (author), IHJ van der Fels-Klerx (author), L.H.J. Goossens (author), W. Jacobs-Reitsma (author), M. de Jong (author), Joost Wagenaar (author), A de Wit (author)