Opsommer, E., Hilfiker, R., Raval-Roland, B., Crombez, G., & Rivier, G. (2013). 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(4950), w13903. https://doi.org/10.4414/smw.2013.13903