“…The principal features include: progressive loss of muscle and subcutaneous tissue, short stature, premature aging, senile face, mental retardation, microcephaly, enophthalmos, retinopathy, beak-like nose, hearing loss, carious teeth, relatively large hands and feet, joint contractures, photosensitive dry skin, and thin hair [Cockayne, 1946;MacDonald et al, 1960;Goldsmith, 1997;Meira et al, 2000].…”