Saltychev, Mikhail, Katri Laimi, Tuula Oksanen, Marianna Virtanen, Jaana Pentti, Mika Kivimäki, and Jussi Vahtera. 2013. “Nine-Year Trajectory of Purchases of Prescribed Pain Medications before and After in-Patient Interdisciplinary Rehabilitation for Chronic Musculoskeletal Disorders: A Prospective, Cohort, Register-Based Study of 4,365 Subjects”. Journal of Rehabilitation Medicine 46 (3):283-86. https://doi.org/10.2340/16501977-1262.