Akio Koizumi

Blood group O is a risk factor for delayed post-polypectomy bleeding

H. Arakawa, K. Ikeda, K. Sumiyama, 2020, Surgical Endoscopy.

Intra-abdominal pressure during endoscopic full-thickness resection comparing manual and automatic control insufflation: a block-randomized porcine study

K. Nakajima, K. Sumiyama, N. Tamai, 2019, Surgical Endoscopy.

Characteristics of superficial esophageal squamous cell carcinomas undetectable with narrow-band imaging endoscopy

K. Sumiyama, Hiroaki Matsui, A. Dobashi, 2021, Gastroenterology report.

Effects of coexisting upper gastrointestinal symptoms on daily life and quality of life in patients with gastroesophageal reflux disease symptoms

K. Nakada, K. Isshi, Hiroto Furuhashi, 2021, Esophagus.