??? ??? ?? ? ? ?? ?? ??? ????? ??? ?? ??? ???? ??? ???? ?????.???? ??? ? ?? ??: ??? ??? ???? ???? ??? ? ????.A chromosomal abnormality consisting in the absence of among the copies of chromosome 7 in somatic cells. [from NCI]By adolescence, all folks with MLIV have critical Visible impairment. A neurodegenerative ingredient of MLIV happens to be m