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O'Brien WA, Hartigan PM, Martin D, Esinhart J, Hill A, Benoit S, Rubin M, Simberkoff MS, Hamilton JD.O'Brien WA, et al.N Engl J Med. 1996 Feb 15;334(7):426-31. doi: 10.1056/NEJM199602153340703.N Engl J Med. 1996.PMID: 8552144Free article.
Merigan TC, Amato DA, Balsley J, Power M, Price WA, Benoit S, Perez-Michael A, Brownstein A, Kramer AS, Brettler D, et al.Merigan TC, et al.Blood. 1991 Aug 15;78(4):900-6.Blood. 1991.PMID: 1831059Free article.Clinical Trial.