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doi.org/10.1093/occmed/52.8.485, hdl.handle.net/1765/67870
Occupational Medicine
Department of General Practice

van Poppel, M., de Vet, H., Koes, B., Smid, T., & Bouter, L. (2002). Measuring sick leave: A comparison of self-reported data on sick leave and data from company records. Occupational Medicine, 52(8), 485–490. doi:10.1093/occmed/52.8.485