1. West-German Centre of Diabetes and Health, Düsseldorf Catholic Hospital Group, 40591 Düsseldorf, Germany
2. Department of Medical Statistics, RWTH-Aachen University, 52062 Aachen, Germany
3. Boehringer Ingelheim Pharma GmbH, 55218 Ingelheim, Germany
4. Boehringer Ingelheim Pharma GmbH & Co. KG, 55218 Ingelheim, Germany
5. mediStatistica, 58809 Neuenrade, Germany
6. Medical Corporate Department, Boehringer Ingelheim Pharma GmbH & Co. KG, 55218 Ingelheim, Germany
7. Mannheim Institute for Public Health, Medical Faculty Mannheim, Ruprecht-Karls University Heidelberg, 68131 Mannheim, Germany