Randomised clinical trial: vonoprazan versus lansoprazole for the initial relief of heartburn in patients with erosive oesophagitis. - Oshima, Tadayuki; Arai, Eitatsu; Taki, Masato; Kondo, Takashi; Tomita, Toshihiko; Fukui, Hirokazu; Watari, Jiro; Miwa, Hiroto (Alimentary Pharmacology & Therapeutics, 2019)