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Braun MM, Haupt R, Caporaso NE.Braun MM, et al.Acta Genet Med Gemellol (Roma). 1994;43(1-2):89-94. doi: 10.1017/s0001566000002993.Acta Genet Med Gemellol (Roma). 1994.PMID: 7847027Review.No abstract available.