Leta, Tesfaye H.
Lygre, Stein HÃ¥kon L.
Skredderstuen, Arne
Hallan, Geir
Gjertsen, Jan-Erik
Rokne, Berit
Furnes, Ove
Funding for this research was provided by:
Department of Orthopedic Surgery and Health Research Program, Haukeland University Hospital, Bergen, Norway (Study grant)