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Opitz JM, Richieri-da Costa A, Aase JM, Benke PJ.Opitz JM, et al.Am J Med Genet. 1988 May-Jun;30(1-2):309-28. doi: 10.1002/ajmg.1320300132.Am J Med Genet. 1988.PMID: 3052062Review.