1. Faculty of Medicine University of Oulu Oulu Finland
2. Information Services Department Finnish Institute of Health and Welfare Helsinki Finland
3. Region Stockholm Academic Primary Health Care Centre Stockholm Sweden
4. Department of Molecular Medicine and Surgery Karolinska Institutet Stockholm Sweden
5. Faculty of Health Sciences University of Eastern Finland Kuopio Finland
6. Department of Paediatric Surgery Kuopio University Hospital Kuopio Finland
7. Department of Anaesthesiology and Intensive Care Kuopio University Hospital Kuopio Finland