1. Stephanie Stock ( ) is an assistant professor at the Institute of Health Economics and Clinical Epidemiology, University Hospital Cologne, in Germany.
2. Anna Drabik is a mathematician at the Institute of Health Economics and Clinical Epidemiology, University Hospital Cologne.
3. Guido Büscher is a statistician at the Institute of Health Economics and Clinical Epidemiology, University Hospital Cologne.
4. Christian Graf is a social scientist at the BARMER GEK, in Wuppertal, Germany.
5. Walter Ullrich is a team leader in medical claims data analysis at the BARMER GEK.
6. Andreas Gerber is head of the health economics department at the German Institute for Quality and Efficiency in Health Care and an adjunct professor of health economics and health services research at the University of Cologne.
7. Karl W. Lauterbach is a member of the German Parliament from Cologne.
8. Markus Lüngen is managing director of the Institute of Health Economics and Clinical Epidemiology and an assistant professor in health economics at the University of Cologne.