1 1Department of Psychology, Health and Technology, Centre for eHealth and Wellbeing Research, University of Twente, P.O. Box 217, 7500AE Enschede, The Netherlands.
2 2Institute of Hygiene, University Hospital Münster, Münster, Germany.
3 3Institute of Medical Microbiology, University Hospital Münster, Münster, Germany.
4 Institute of Hospital Hygiene Oldenburg, Oldenburg, Germany.
5 5Department of Infection Prevention, Hospital Group Twente, Almelo/Hengelo, Netherlands.