Departments of *Paediatric Surgery and Orthopaedics
§Biostatistics, University of Turku and Turku University Hospital, Turku
†Department of Paediatric Surgery, Kuopio University Hospital, Kuopio
‡Information Services Department, Finnish Institute for Health and Welfare
¶Department of Orthopaedics and Traumatology, Helsinki University Hospital and University of Helsinki, Finland
∥Department of Neurobiology, Care Sciences and Society, Karolinska Institute, Stockholm, Sweden
J.S., I.H., A.R., Y.N., M.G.: study conception and design. J.S., A.-M.L.-K., M.G.: acquisition of data. J.S., A.R., S.H., E.L.: drafting of the manuscript.
Supported by research grants from Clinical Research Institute HUCH received by A.R., J.S., and I.H. In addition, A.R. has received research grants from Emil Aaltonen Foundation and Turku University Foundation. The remaining authors declare no conflicts of interest.
Reprints: Arimatias Raitio, PhD, Turku University Hospital, Kiinamyllynkatu 4-8, Turku 20521, Finland. E-mail: [email protected].