1. Department of Epidemiology and Health Economics, Institute of Social Medicine, corporate member of Freie Universität Berlin and Humboldt - Universität zu Berlin, Charité - Universitätsmedizin Berlin, Berlin, Germany.
2. Department of Internal and Integrative Medicine, Immanuel Krankenhaus Berlin, Berlin, Germany.
3. Department of Pediatric Respiratory Medicine, Immunology and Critical Care Medicine, corporate member of Freie Universität Berlin and Humboldt - Universität zu Berlin, Charité - Universitätsmedizin Berlin, Berlin, Germany.
4. Department of Sports Medicine, corporate member of Freie Universität Berlin and Humboldt - Universität zu Berlin, Charité - Universitätsmedizin Berlin, Berlin, Germany.