Affiliation: | 1. Institute of Health Economics and Clinical Epidemiology, University Hospital of Cologne, Gleueler Str. 176-178, 50935, Cologne, Germany 2. Department of Business Administration and Health Care Management, University of Cologne, Cologne, Germany 3. Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Canada 4. Frankfurt School of Finance and Management, Frankfurt, Germany
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