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Hemsell DL, Johnson ER, Heard MC, Hemsell PG, Nobles BJ, Bawdon RE.Hemsell DL, et al. Among authors: hemsell pg.South Med J. 1989 Apr;82(4):438-42. doi: 10.1097/00007611-198904000-00008.South Med J. 1989.PMID: 2649996Clinical Trial.