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Tian Z, Yang X, Giles M, Wang T, Gao H, Butker E, Liu T, Kahn S.Tian Z, et al. Among authors: butker e.Med Phys. 2020 Apr;47(4):1523-1532. doi: 10.1002/mp.14078. Epub 2020 Feb 26.Med Phys. 2020.PMID: 32027029
McGinley PH, Butker EK, Crocker IR, Aiken R.McGinley PH, et al. Among authors: butker ek.Phys Med Biol. 1992 Feb;37(2):413-9. doi: 10.1088/0031-9155/37/2/008.Phys Med Biol. 1992.PMID: 1553391
McGinley PH, Butker EK, Crocker IR, Landry JC.McGinley PH, et al. Among authors: butker ek.Phys Med Biol. 1990 May;35(5):649-57. doi: 10.1088/0031-9155/35/5/005.Phys Med Biol. 1990.PMID: 2190241