Affiliation: | (1) Department of Medical Microbiology, Universitiy of Maastricht, PO Box 616, 6200 MD Maastricht, The Netherlands e-mail: A.vandenBogaard@cpv.unimaas.nl, NL;(2) Department of Medical Microbiology, General Hospital Arnhem, PO Box 9025, 6800 EG Arnhem, The Netherlands, NL |