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Hall CB, McBride JT, Walsh EE, Bell DM, Gala CL, Hildreth S, Ten Eyck LG, Hall WJ.Hall CB, et al. Among authors: walsh ee.N Engl J Med. 1983 Jun 16;308(24):1443-7. doi: 10.1056/NEJM198306163082403.N Engl J Med. 1983.PMID: 6343860Clinical Trial.