Ogasawara, Kouji, Susumu Nakajima, Hiroshi Sato, and Tadashi Sasaki. 2020. “Helicobacter Pylori Eradication Using Laser Endoscope and Methylene Blue”. Laser Therapy 29 (1): 19-27. https://doi.org/10.5978/islsm.20-OR-02.