RT Journal Article SR Electronic T1 Paternal age effect in fibrodysplasia ossificans progressiva. JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP 147 OP 148 DO 10.1136/jmg.16.2.147 VO 16 IS 2 A1 J G Rogers A1 G A Chase YR 1979 UL http://jmg.bmj.com/content/16/2/147.abstract AB Analysis by the method of Smith (1972) of birth order and parental age data collected from 38 of 42 patients with fibrodysplasia ossificans progressive shows a significant paternal age effect. This finding among the sporadically occurring cases would support the proposition that this condition usually arises as a new dominant mutation.