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Sir.—The recent article by Rosenberg et al (Journal 1980;134;170-175) provided interesting clinical and biochemical data as well as an extensive review of the scarce literature on this topic. I wish to call attention to four reports on this subject that previously appeared in the European literature, which have been unfortunately overlooked, apparently owing to the difficulty of the language.1-4
Ayraud et al1 reported a case of interstitial deletion of the long arm of chromosome 7 with