1. Institute of Social and Preventive Medicine (ISPM), University of Bern, Bern, Switzerland
2. School of Social and Community Medicine, University of Bristol, Bristol, UK
3. Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands
4. Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
5. Julius Centre for Health Sciences and Primary Care, University Medical Centre Utrecht, Utrecht, The Netherlands