Comparison of pregnancy outcomes between women with early‐onset and late‐onset gestational diabetes in a retrospective multi‐institutional study in Japan oleh Tomoka Usami, Maki Yokoyama, Megumi Ueno, Noriyuki Iwama, Norimasa Sagawa, Reo Kawano, Masako Waguri, Hiroshi Sameshima, Yuji Hiramatsu, Takashi Sugiyama, for the Japan Diabetes and Pregnancy Study Group