Linder, Jürgen, Gunilla Brodda Jansen, Kristina Schüldt Ekholm, and Jan Ekholm. “Relationship Between Sleep Disturbance, Pain, Depression and Functioning in Long-Term Sick-Listed Patients Experiencing Difficulty in Resuming Work”. Journal of Rehabilitation Medicine 46, no. 8 (May 20, 2014): 798–805. Accessed February 16, 2025. https://medicaljournalssweden.se/jrm/article/view/15737.