Affiliation: | 1. Department of Nephrology and Medical Intensive Care, Charité-Universit?tsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany 2. Hochschule für Oekonomie und Management, 10625, Berlin, Germany 3. IMS HEALTH GmbH & Co. OHG, Erika-Mann-Strasse 5, 80636, Munich, Germany 4. StatSciConsult, Maillingerstr. 8, 80636, Munich, Germany
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