1. Institute of Social Medicine, Epidemiology and Health Economics, Charité—Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universitaät zu Berlin, Berlin, Germany.
2. Department of Internal and Integrative Medicine, Immanuel Hospital Berlin, Berlin, Germany.
3. Hasso Plattner Institute, Digital Health Center, University of Potsdam, Potsdam, Germany.
4. Department of Psychology and Psychotherapy, Witten/Herdecke University, Witten, Germany.