WAGENVOORT, J.H.T.; VAN DER WILLIGEN, A. H.; VAN VLIET, H. J. A.; MICHEL, M. F.; VAN KLINGEREN, B.; WAGENVOORT J.H.T.; Department of Clinical Microbiology. Department of Dermato-Venertology, University Hospital; VAN DER WILLIGEN A. H.; Department of Clinical Microbiology. Department of Dermato-Venertology, University Hospital; VAN VLIET H. J. A.; Department of Clinical Microbiology. Department of Dermato-Venertology, University Hospital; MICHEL M. F.; Department of Clinical Microbiology. Department of Dermato-Venertology, University Hospital; VAN KLINGEREN B.; National Institute of Public Health and Enviromental Hygeine