Funding for this research was provided by:
County Council of Östergötland, Linköping, Sweden
Received: 4 July 2019
Accepted: 23 September 2019
First Online: 24 October 2019
Ethics approval and consent to participate
: The PREPARE study was approved by the Regional Ethics Committee of the Faculty of Health sciences of Linköping university (dnr 2012/167-31). Patients´ gave their written consent to participate in the study.
: AA is an associate editor at BMC Musculoskeletal Disorders. The authors have no competing interest to declare.