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Progressive alopecia in IL-15tg mice. Photograph of a representative 18-wk-old IL-15tg mouse, illustrating the progressive alopecia that involves 50–90% of the skin surface area. The alopecia typically begins at 4–6 wk of age initially involving the head and proximal limbs. A sex- and age-matched wild-type FVB mouse is shown below for comparison.
