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Sequential images of patchy hair loss. (A) A hairless 5 cm × 6 cm patch with residual exclamation mark hairs at diagnosis. (B) Sequential images are shown on day 68, 75, 89, 103, 124, and 196. (C and D) Multiple hairless patches at relapse on day 337 (C), which completely regrew hair on day 561 (D).
