???? ??? ?? ?? ? ????? ? ?? ??? ?? ???? ??? ??? ? ??? ? ??? ? ?? ? ??? ??? ??????.Trichothiodystrophy, commonly known as TTD, is really a uncommon inherited ailment that has an effect on numerous aspects of the human body. The hallmark of the situation is hair that is definitely sparse and easily damaged. [from MedlinePlus Genetics]Roughly 87 % of