1. Institute for Medical Information Processing, Biometry, and Epidemiology (IBE) Ludwig Maximilian University of Munich Munich Germany
2. Chair of Epidemiology, University of Augsburg University Hospital Augsburg Augsburg Germany
3. Medical Library, Augsburg University Library University of Augsburg Augsburg Germany
4. Bereich Versorgungsmanagement AOK Bayern Munich Germany
5. Association of Statutory Health Insurance Physicians in Bavaria Kassenärztliche Vereinigung Bayerns, KVB Munich Germany
6. Institute of Health Services Research in Dentistry University of Münster Münster Germany