厚生労働省IgG4 関連全身硬化性疾患の診断法の確立と治療方法の開発に関する研究班 厚生労働省難治性の肝胆道疾患に関する調査研究班 日本胆道学会 / The Research Committee of IgG4-related Diseases provided by the Ministry of Health, Labor, and Welfare of Japan (chaired by Kazuichi Okazaki) The Research Committee of Intractable Diseases of Liver and Biliary Tract provided by the Ministry of Health, Labor, and Welfare of Japan (chaired by Hirohito Tsubouchi) The Japan Biliary Association (chaired by Kazuo Inui)