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The online version of the original article can be found underdoi:10.1007/s00586-010-1652-y.P. Sla¨tis S. Seitsalo K. Tallroth H. HurriORTON Orthopaedic Hospital, Invalid Foundation,Helsinki, FinlandA. Malmivaara (&)Centre for Health Economics,National Institute for Health and Welfare,P.O. Box 30, 00271 Helsinki, Finlande-mail: antti.malmivaara@thl.fiM. Helio¨vaara P. Sainio P. KnektNational Institute for Health and Welfare,P.O. Box 30, 00271 Helsinki, FinlandA. Herno V. TurunenDepartment of Orthopaedic Surgery,Kuopio University Hospital, Kuopio, FinlandJ. KankareDepartment of Orthopaedic and Trauma Surgery (JK),Helsinki University Hospital, Helsinki, Finland |