1. Department of Medicine for Older People, Amsterdam UMC, Vrije Universiteit Amsterdam , De Boelelaan 1117, Amsterdam , the Netherlands
2. Amsterdam Public Health Research Institute, Aging & Later Life , Amsterdam , the Netherlands
3. Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University , Utrecht , the Netherlands
4. The Antibiotic Centre for Primary Care, Department of General Practice, Institute of Health and Society, University of Oslo , Oslo , Norway
5. General Practice/Family Medicine, School of Public Health and Community Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg , Gothenburg , Sweden
6. Research, Education, Development & Innovation, Primary Health Care, Region Västra Götaland , Sweden
7. Primary Health Care Clinic for Homeless People , Närhälsan, Region Västra Götaland , Sweden
8. Centre for Family and Community Medicine, the Faculty of Health Sciences, The Medical University of Lodz , Lodz , Poland
9. Family Doctors‘ Clinic , Lodz , Poland