??? ??? ?? ? ? ?? ?? ??? ????? ??? ?? ??? ???? ??? ???? ?????.????? ??? ????? ???? ????.????? ???? ??? ??? ??? ???? ?????.A chromosomal abnormality consisting in the absence of among the list of copies of chromosome seven in somatic cells. [from NCI]By adolescence, all persons with MLIV have critical visual impairment. A neurodegenerative componen… Read More