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Pras E, Aksentijevich I, Gruberg L, Balow JE Jr, Prosen L, Dean M, Steinberg AD, Pras M, Kastner DL.Pras E, et al. Among authors: steinberg ad.N Engl J Med. 1992 Jun 4;326(23):1509-13. doi: 10.1056/NEJM199206043262301.N Engl J Med. 1992.PMID: 1579134Free article.