RecruitingA Real World Study to Globally Assess Disease Burden in Adolescent and Adult Participants With Alopecia Areata, Vitiligo, or Hidradenitis SuppurativaThis study is to assess the burden of disease in adolescent and adult participants with moderate or severe alopecia areata (AA), non-segmental vitiligo (NSV), or moderate to severe hidradenitis suppurativa (HS) in a large global real-world participant population.