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APA Citation
Abeler, K., Sand, T., Friborg, O., & Bergvik, S. (2020). seasonality in pain, sleep and mental distress in patients with chronic musculoskeletal pain at latitude 69° N. Chronobiology international, 37, 1650–1661. http://access.bl.uk/ark:/81055/vdc_100115309304.0x000045