Aging.
D000368:Aged; D000375:Aging; D003430:Cross-Sectional Studies; D004198:Disease Susceptibility; D004817:Epidermis / Q000473:pathology / Q000503:physiopathology; D006197:Hair / Q000294:innervation / Q000503:physiopathology; D006801:Humans; D012871:Skin Diseases / Q000503:physiopathology*