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Acitretin treatment unexpectedly darkened a patient's gray hair.
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March 2010 in “British Journal of Dermatology” Genetic marker rs12558842 strongly linked to male hair loss.
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August 2016 in “Science Signaling” Alopecia areata patients show unique protein activity patterns, suggesting imbalanced signaling pathways.
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The hairline can reliably guide neurosurgical planning.