Lindh, M. et al. 1997. A randomized prospective study of vocational outcome in rehabilitation of patients with non-specific musculoskeletal pain: a multidisciplinary approach to patients identified after 90 days of sick-leave. Journal of Rehabilitation Medicine. 29, 2 (Jun. 1997), 103–112. DOI:https://doi.org/10.2340/165019771997103112.