1. Department of General Practice and Primary Healthcare, HUS Institute of Clinical Medicine, University of Helsinki, Helsinki, Finland;
2. Social and Health Bureau of the City of Vantaa, Health Centre of the City of Vantaa, Vantaa, Finland;
3. Health Centre of Nurmijärvi, Nurmijärvi, Finland;
4. Department of General Practice and Primary Healthcare, University of Helsinki, Helsinki University Hospital, Helsinki, Finland