1. 1Institute for Medical Information Processing, Biometry, and Epidemiology, Faculty of Medicine, Ludwig-Maximilians-Universität in Munich, Munich, Germany; email: heidi.stoeckl@ibe.med.uni-muenchen.de
2. 2Pettenkofer School of Public Health, Munich, Germany
3. 3School of Social Policy & Practice; Program in Health & Sciences, School of Arts & Sciences; and Center for Public Health Initiatives, University of Pennsylvania, Philadelphia, Pennsylvania, USA