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August 2007 in “Journal of Clinical Investigation” Alopecia areata is an autoimmune disease where T cells attack hair follicles.
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April 2016 in “Case Reports in Dermatology” Tofacitinib temporarily regrew hair in a man with alopecia, but its effects didn't last.
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August 2011 in “Journal of the American Academy of Dermatology” Vitiligo is a skin condition causing white spots, more common in women, often starts before age 20, and can affect mental health.