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Crone MR, Reijneveld SA, Willemsen MC, van Leerdam FJ, Spruijt RD, Sing RA.Crone MR, et al. Among authors: willemsen mc.J Epidemiol Community Health. 2003 Sep;57(9):675-80. doi: 10.1136/jech.57.9.675.J Epidemiol Community Health. 2003.PMID: 12933772Free PMC article.Clinical Trial.
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