title: Frequency of the appearance of the dominant mutation of achondroplasia in man. Communication I. Ratio of sporadic and familial cases.
mesh_terms: D000130:Achondroplasia / Q000453:epidemiology / Q000235:genetics*; D000367:Age Factors; D001722:Birth Order; D005260:Female; D005787:Gene Frequency; D005799:Genes, Dominant; D006801:Humans; D008297:Male; D010290:Parents; D010375:Pedigree