1. Department of Hygiene and Epidemiology; University of Ioannina School of Medicine; Ioannina Greece
2. Department of Primary Education; University of Ioannina; Ioannina Greece
3. Julius Center for Health Sciences and Primary Care; University Medical Center Utrecht; Utrecht The Netherlands
4. Cochrane Netherlands, Julius Center for Health Sciences and Primary Care; University Medical Center Utrecht; Utrecht The Netherlands
5. Department of Psychiatry and Psychotherapy; Technische Universität München; München Germany
6. Eli Lilly and Company; Lilly Research Centre; Windlesham U.K.
7. Department of Cardiology; Bern University Hospital; Bern Switzerland
8. Institute of Social and Preventive Medicine; University of Bern; Bern Switzerland
9. Berner Institut für Hausarztmedizin (BIHAM); University of Bern; Bern Switzerland