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doi.org/10.1016/S0161-4754(03)00004-6, hdl.handle.net/1765/68084
Journal of Manipulative and Physiological Therapeutics
Department of General Practice

Bakker, E., Koning, H., Verhagen, A., & Koes, B. (2003). Interobserver reliability of the 24-Hour Schedule in patients with low back pain: A questionnaire measuring the daily use and loading of the spine. Journal of Manipulative and Physiological Therapeutics, 26(4), 226–232. doi:10.1016/S0161-4754(03)00004-6