1. Department of Medicine, Administration, Helsinki University Central
Hospital, Helsinki, Finland
2. Department of Surgery, Peijas Hospital, Vantaa, Finland
3. Department of Industrial Engineering and Management, Helsinki
University of Technology, Espoo, Finland
4. Myyrmäki Health and Social Welfare Centre, Vantaa, Finland
5. Department of Internal Medicine, Hyvinkää Hospital, Hyvinkää,
Finland