1. Hyvinkää City Health Centre, Hyvinkää, Finland;
2. Department of General Practice and Primary Health Care, University of Helsinki, Helsinki, Finland;
3. Hyvinkää City Health Center, Hyvinkää, Finland;
4. Health Care and Social Services, Keski-Uusimaa Joint Municipality Authority, Uusimaa, Finland;
5. Unit of Primary Health Care, Helsinki University Hospital, Helsinki, Finland