Immunoglobulin G4‐related disease in a psoriasis vulgaris patient treated with ustekinumab. Issue 7 (14th June 2014) - Kajihara, Ikko; Makino, Katsunari; Ichihara, Asako; Fukushima, Satoshi; Jinnin, Masatoshi; Hirooka, Sayuri; Kojima, Keisuke; Kourogi, Hirotsugu; Ihn, Hironobu