[1] Toho Univ, Sakura Med Ctr, Dept Internal Med, Div Neurol, Sakura, Chiba 2858741, Japan
[2] Toho Univ, Sakura Med Ctr, Dept Internal Med, Div Gastroenterol, Sakura, Chiba 2858741, Japan
[3] Toho Univ, Sakura Med Ctr, Dept Dermatol, Sakura, Chiba 2858741, Japan