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Linkage of Autosomal Dominant Hearing Loss to the Short Arm of Chromosome 1 in Two Families
Ist Teil von
The New England journal of medicine, 1994-08, Vol.331 (7), p.425-431
Ort / Verlag
Boston, MA: Massachusetts Medical Society
Erscheinungsjahr
1994
Link zum Volltext
Quelle
Free E-Journal (出版社公開部分のみ)
Beschreibungen/Notizen
Deafness affects approximately one person in two by the age of 80 years
1
. Hearing loss also affects about one in every thousand children
1
,
2
. More than 60 percent of the cases of profound early-onset deafness are caused by genetic factors, in most cases probably single gene mutations
3
. About 75 percent of the people with genetically determined deafness have no additional clinical abnormalities. The other 25 percent have clinically recognizable signs that constitute an identifiable syndrome
1
–
3
. In progressive hearing loss in the later decades, environmental causes play an important part, although underlying genetic risk factors are . . .