Widespread use of proton pump inhibitors or potassium-competitive acid blocker has changed the status of gastrointestinal bleeding in patients with ischemic heart disease: real-wor... oleh Shun Sasaki, Kazuhiro Ota, Makoto Sanomura, Yosuke Mori, Hironori Tanaka, Akitoshi Hakoda, Noriaki Sugawara, Taro Iwatsubo, Yuki Hirata, Kazuki Kakimoto, Hideaki Morita, Wataru Nagamatsu, Masaaki Hoshiga, Toshihisa Takeuchi, Kazuhide Higuchi, Hiroki Nishikawa