1. Family Medicine, Department of Community Medicine, Information and Decision in Health (MEDCIDS) of the Faculty of Medicine of Porto, Centre for Health Technology and Services Research (CINTESIS), Porto, Portugal;
2. Division of Public Health, Centre for Family and Community Medicine, Medical University of Lodz, Lodz, Poland;
3. Chronic Diseases Research Centre, NOVA Medical School/Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, Lisboa, Portugal;
4. Section of General Practice & Research Unit for General Practice, Department of Public Health, Faculty of Health Sciences, Primary Healthcare Research Unit, University of Copenhagen, Region Zealand, Denmark