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Alvarez RD, Kilgore LC, Partridge EE, Austin JM, Shingleton HM.Alvarez RD, et al. Among authors: shingleton hm.South Med J. 1993 Nov;86(11):1256-8. doi: 10.1097/00007611-199311000-00014.South Med J. 1993.PMID: 8235778Review.