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van der Weide WE, Verbeek JH, van Dijk FJ, Hulshof CT.van der Weide WE, et al. Among authors: hulshof ct.Occup Environ Med. 1998 Jun;55(6):375-82. doi: 10.1136/oem.55.6.375.Occup Environ Med. 1998.PMID: 9764096Free PMC article.