1. Department of Medical Biometry and Epidemiology; University Medical Center Hamburg-Eppendorf; Hamburg Germany
2. Department of Statistics and Probability; Michigan State University; East Lansing Michigan
3. Institute of Biometry and Clinical Epidemiology; Charité - Universitätsmedizin Berlin (corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health); Berlin Germany
4. Berlin Institute of Health; Berlin Germany
5. Institute of Medical Biometry and Informatics; Heidelberg University Hospital; Heidelberg Germany