1. Institute of Epidemiology and
2. Focus Network Nanoparticles and Health (NanoHealth), Helmholtz Zentrum München–German Research Center for Environmental Health, Neuherberg, Germany;
3. Environment Science Center, University of Augsburg, Augsburg, Germany;
4. Institute of Inhalation Biology, Helmholtz Zentrum München–German Research Center for Environmental Health, Neuherberg, Germany;
5. Department of Statistics and
6. IBE-Chair of Epidemiology, Ludwig-Maximilians-University, Munich, Germany