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From the Department of Surgical Sciences, Division of Orthopedics (P. Försth, T.C.,
P. Fritzell, K.M., B.S.), and the Uppsala Clinical Research Center (P.Ö., K.M.), Uppsala
University, Uppsala, Stockholm Spine Center (P. Försth, A.F.), the Department of Learning,
Informatics, Management, and Ethics, Karolinska Institutet (G.Ó., F.B.), and Quantify
Research (G.Ó., F.B.), Stockholm, and Futurum-Academy for Health and Care, Neuro-orthopedic
Center, Ryhov (P. Fritzell) - all in Sweden.