Letter: Risks of malformed relatives.
D000328:Adult; D000757:Anencephaly / Q000453:epidemiology / Q000235:genetics*; D001315:Australia; D003241:Consanguinity; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D011247:Pregnancy; D012306:Risk; D016135:Spinal Dysraphism / Q000453:epidemiology / Q000235:genetics*