1 Mannheim Institute of Public Health, Social and Preventive Medicine, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany; Department of Clinical Psychology, University of Amsterdam, Amsterdam, The Netherlands; Department of Work and Organizational Psychology, University of Amsterdam, Amsterdam, The Netherlands. Electronic address: burkhard.schmidt@medma.uni-heidelberg.de.
2 Mannheim Institute of Public Health, Social and Preventive Medicine, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany; Department of Clinical Psychology, University of Amsterdam, Amsterdam, The Netherlands.