A Long-Term Study to Learn About The Study Medicine Called Ritlecitinib in Children With Severe Alopecia Areata.

A Study of 2 Doses of Ritlecitinib in People 12 Years of Age and Older With Alopecia Areata

A Study to Learn About Medicine Called Ritlecitinib in Children Aged Between 6 to 12 Years With Severe Alopecia Areata

Characterization And Clinical Outcomes of AA Patients Treated With Ritlecitinib

A Study to Learn About Litfulo Capsule in People With Severe Alopecia Areata in Routine Clinical Practice.