Propagermanium administration for patients with type 2 diabetes and nephropathy: A randomized pilot trial oleh Akinori Hara, Miho Shimizu, Erika Hamaguchi, Hirokazu Kakuda, Kenzo Ikeda, Toshiya Okumura, Kiyoki Kitagawa, Yoshitaka Koshino, Motoo Kobayashi, Kazuya Takasawa, Yukimasa Hisada, Tadashi Toyama, Yasunori Iwata, Norihiko Sakai, Takashi Wada