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Burch JD, Howe GR, Miller AB, Semenciw R.Burch JD, et al. Among authors: howe gr.J Natl Cancer Inst. 1981 Dec;67(6):1219-24.J Natl Cancer Inst. 1981.PMID: 6947107
L'Abbé KA, Howe GR, Burch JD, Miller AB, Abbatt J, Band P, Choi W, Du J, Feather J, Gallagher R, et al.L'Abbé KA, et al. Among authors: howe gr.Health Phys. 1991 Apr;60(4):489-95. doi: 10.1097/00004032-199104000-00002.Health Phys. 1991.PMID: 2001944