IL17A and alopecia universalis congenita: There was no significant difference in AU incidence between ETN (OR = 0.499, CI 95% [0.198–1,259] p = 0.141) or anti-IL17A (OR = 1,345, CI 95% [0.465–3,886] p = 0.585) and placebo (Fig. 3a–c).