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Chestnut DH, Owen CL, Geiger M, Bates JN, Choi WW, Ostman PL.Chestnut DH, et al. Among authors: ostman pl.South Med J. 1989 Oct;82(10):1224-7. doi: 10.1097/00007611-198910000-00006.South Med J. 1989.PMID: 2678497Clinical Trial.