Correction to: Response to Hydroxychloroquine in Japanese patients with Lupus-Related Skin Disease Using the Cutaneous Lupus Erythematosus Disease Area and Severity Index (CLASI). Issue 4 (July 2014) - Yokogawa, Naoto; Tanikawa, Akiko; Amagai, Masayuki; Kato, Yukihiko; Momose, Yoko; Arai, Satoru; Eto, Hikaru; Ikeda, Takaharu; Furukawa, Fukumi; the Japanese Hydroxychloroquine Study Group