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de Boer AG, Spruijt RJ, Sprangers MA, de Haes JC.de Boer AG, et al. Among authors: spruijt rj.Qual Life Res. 1998 Feb;7(2):135-42. doi: 10.1023/a:1008805409794.Qual Life Res. 1998.PMID: 9523495