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An analysis of the parental age effect for inv dup (15).
  1. J M Connor,
  2. D H Gilmore


    Parental ages and birth order were analysed in 16 sporadic cases of inv dup (15) using the method of Smith. A significant maternal age effect was apparent (dm = 5.989, SE 1.86; df = 2.02, SE 2.496; db = 0.138, SE 0.46).

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