Kuijpers, T., van der Windt, D., van der Heijden, G., Twisk, J., Vergouwe, Y., & Bouter, L. (2006). A prediction rule for shoulder pain related sick leave: a prospective cohort study. BMC musculoskeletal disorders, 97 - ?. https://doi.org/10.1186/1471-2474-7-97