1. Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
2. Department of Pediatrics, Kuopio University Hospital, Kuopio, Finland
3. Institute of Clinical Medicine and Department of Pediatrics, University of Eastern Finland, Kuopio, Finland
4. Department of Surgery, Central Finland Central Hospital Nova, Jyväskylä, Finland
5. Department of Obstetrics and Gynecology, Tampere University Hospital, Tampere, Finland
6. Faculty of Medicine and Health Technology, Center for Child, Adolescent and Maternal Health Research, Tampere University, Tampere, Finland
7. Department of Orthopaedics and Traumatology, Tampere University Hospital, Tampere, Finland