Affiliation: | (1) Department of Orthopaedics and Traumatology, Kuusankoski Regional Hospital, 45750 Kuusankoski, Finland;(2) Department of General Practice and Primary Health Care, University of Helsinki, Mannerheimintie 172, PO Box 41, 00014 Helsinki, Finland;(3) Department of Orthopaedics and Traumatology, Kuopio University Hospital, PO Box 1777, 70211 Kuopio, Finland;(4) Sairaalankuja 2, 45750 Kuusankoski, Finland |