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Bluestone CD, Beery QC, Michaels RH, Zanotti ML, Stool SE, Grundfast KM, Wright CM, Mandel EM.Bluestone CD, et al. Among authors: mandel em.Postgrad Med J. 1979;55 Suppl 4:42-9.Postgrad Med J. 1979.PMID: 398480Clinical Trial.