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Effects of topical dihydrotestosterone (DHT) on hair regeneration in C57BL/6 mice. The back skin was treated with DHT (10-6, 10-7, or 10-8 mol/L) every day for 18 days in the DHT groups, while the vehicle-treated control group was treated with 40% DMSO. The back skin was photographed at days 0, 3, 6, 9, 12, 14, and 17 after treatment initiation.
