1. Institute of Epidemiology, Helmholtz Zentrum München–German Research Center for Environmental Health, Neuherberg, Germany;
2. Institute for Medical Information Processing, Biometry and Epidemiology, Medical Faculty, Ludwig-Maximilians-Universität München, Munich, Germany;
3. Saxon State Office for Environment, Agriculture and Geology, Dresden, Germany;
4. Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA