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About the article
Published Online: 2018-02-22
Research funding: We gratefully acknowledge the financial support from the Marianne and Marcus Wallenberg Foundation, the Axel and Margaret Ax:son Johnson Foundation, Volvo and Vägverket.
Conflict of interest: The authors have no conflict of interest.
Informed consent: All patients were given both oral and written information on all parts of the study and gave their written informed consent.
Ethical approval: The study was approved by the Medical Ethics Committee, Örebro, Sweden, no. 368/96. The study is registered in ClinicalTrials.gov (registration no. NCT01994044).
Citation Information: Scandinavian Journal of Pain, 20170180, ISSN (Online) 1877-8879, ISSN (Print) 1877-8860, DOI: https://doi.org/10.1515/sjpain-2017-0180.