1. Department of General Practice and Primary Health Care, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
2. Vantaa Health Centre, City of Vantaa, Finland
3. Folkhälsan Research Center, Helsinki, Finland
4. Nurmijärvi Health Centre, City of Nurmijärvi, Finland
5. National University of Singapore, Singapore, Republic of Singapore
6. Singapore Institute for Clinical Sciences (SICS, Agency for Science, Technology and Research (A*STAR), Singapore, Republic of Singapore