Within 3 weeks, mice that received topical ruxolitinib or tofacitinib had regrown nearly all their hair (right photo; drug was applied only to the right side of the mouse). Little to no hair growth occurred in control mice during the same timeframe (left photo).
Columbia University Medical Center/From S. Harel et al., Sci. Adv. 1, e1500973 (2015). Distributed under a Creative
Commons Attribution Non Commercial License 4.0 (CC BY-NC). 10.1126/sciadv.1500973