A Study of the Bruton's Tyrosine Kinase (BTK) Inhibitor Ibrutinib in Participants With Steroid Dependent/Refractory Chronic Graft Versus Host Disease (cGVHD)

Anjo Kosei Hospital, Anjo-shi

Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, Bunkyō City

Hiroshima Red Cross Hospital & Atomic-bomb Survivors Hospital, Hiroshima

Tokai University Hospital, Isehara

Osaka Women's and Children's Hospital, Izumi

Kobe City Medical Center General Hospital, Kobe

National Hospital Organization Kumamoto Medical Center, Kumamoto

Kurashiki Central Hospital, Kurashiki

Gunmaken Saiseikai Maebashi Hospital, Maebashi

Japanese Red Cross Nagoya Daiichi Hospital, Nagoya

The Hospital of Hyogo College of Medicine, Nishinomiya

Okayama University Hospital, Okayama

Osaka City University Hospital, Osaka

Hokkaido University Hospital, Sapporo

National Center for Child Health and Development, Setagaya Ku