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van den Brink-Muinen A, Bensing JM, Kerssens JJ.van den Brink-Muinen A, et al. Among authors: kerssens jj.Med Care. 1998 Jan;36(1):100-6. doi: 10.1097/00005650-199801000-00012.Med Care. 1998.PMID: 9431336