Opsommer, Emmanuelle, Roger Hilfiker, Barbara Raval-Roland, Geert Crombez, and Gilles Rivier. “Test-Retest Reliability of the Örebro Musculoskeletal Pain Screening Questionnaire and the Situational Pain Scale in Patients With Chronic Low Back Pain”. Swiss Medical Weekly 143, no. 4950 (December 1, 2013): w13903. Accessed November 1, 2024. https://smw.ch/index.php/smw/article/view/1787.