1. Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
2. Department of Ambulatory Care and Community Medicine, University Hospital, Lausanne, Switzerland
3. Institute of Primary Health Care (BIHAM), University of Bern, Bern, Switzerland
4. Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, Minnesota, USA
5. Department of Psychology, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana, USA
6. Department of Radiology, Vanderbilt University, Nashville, Tennessee, USA