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Butler TH, Miller KS, Holtgrave DR, Forehand R, Long N.Butler TH, et al.J Sex Res. 2006 Nov;43(4):378-86. doi: 10.1080/00224490609552337.J Sex Res. 2006.PMID: 17599259
Butler TH, Wilson AJ.Butler TH, et al.Br Med J. 1937 Apr 10;1(3979):752-3. doi: 10.1136/bmj.1.3979.752.Br Med J. 1937.PMID: 20780591Free PMC article.No abstract available.