From the *Department of Orthopedic Surgery, National Hospital, Oslo, the
†Department of Neurosurgery, St. Olav’s Hospital, Trondheim, the
‡Coast Hospital for Physical Medicine and Rehabilitation, Stavern, the
§Department of Physical Medicine and Rehabilitation, Ullevaal University Hospital, Oslo, the
∥Department of Neurosurgery, University North Norway, Tromsø, and the
¶Department of Biological and Medical Psychology, University of Bergen, Norway.
Acknowledgment date: September 18, 2002.
Acceptance date: October 28, 2002.
The manuscript submitted does not contain information about medical device(s)/drug(s). Federal and Foundation funds were received in support of this work. No benefits in any form have been or will be received from a commercial party related directly or indirectly to the subject of this manuscript.
Address reprint requests to Jens Ivar Brox, Department of Orthopaedics, National Hospital, 0027, Oslo, Norway. E-mail: jens.ivar.brox@rikshospitalet.no
