Ascertainment of genetic disease in relatives of affected persons.
D002869:Chromosome Aberrations / Q000175:diagnosis; D025063:Chromosome Disorders; D005190:Family; D005260:Female; D005500:Follow-Up Studies; D030342:Genetic Diseases, Inborn / Q000175:diagnosis* / Q000235:genetics / Q000517:prevention & control / Q000628:therapy; D006801:Humans; D007256:Information Systems; D008297:Male; D008403:Mass Screening; D008499:Medical Records; D008661:Metabolism, Inborn Errors / Q000175:diagnosis; D008722:Methods; D011230:Precancerous Conditions / Q000175:diagnosis; D012729:Sex Chromosome Aberrations / Q000175:diagnosis