Observational study of the effects of dabigatran on gastrointestinal symptoms in patients with non-valvular atrial fibrillation oleh Takeshi Yamashita, FJCC, MD, PhD, Eiichi Watanabe, Takanori Ikeda, Tsuyoshi Shiga, Kengo F. Kusano, Naohiko Takahashi, Toshiyuki Takahashi, Akira Nozaki, Masashi Kasao, Tohru Fukatsu, Yuichiro Kawamura, Takashi Komatsu, Naoki Matsumoto, Tomoharu Arakawa, Atsushi Sugiura, Tetsu Iwao, Tatsuhiko Ooie