Division of Metabolism and Endocrinology, Department of Internal Medicine, St. Marianna University School of Medicine, 2-16-1, Sugao, Miyamae-Ku, Kawasaki, Kanagawa, 216-8511, Japan

Ayaka Takemoto, Yoshio Nagai, Shin Kawanabe, Tomoko Nakagawa & Masakatsu Sone

Department of Diabetes and Endocrinology, Kanto Rosai Hospital, 1-1, Kizukisumiyoshicho, Nakahara-Ku, Kawasaki, Kanagawa, 211-8510, Japan

Yoshio Nagai

St. Marianna University School of Medicine, 2-16-1, Sugao, Miyamae-Ku, Kawasaki, Kanagawa, 216-8511, Japan

Kaho Matsumoto

Department of Obstetrics and Gynecology, St. Marianna University School of Medicine, Kawasaki, Kanagawa, Japan

Junichi Hasegawa & Nao Suzuki

Diabetes Center, Yokohama General Hospital, 2201-5, Kuroganecho, Aoba-Ku, Yokohama, Kanagawa, 225-0025, Japan

Yasushi Tanaka