RT Journal Article SR Electronic T1 Efficacy of vonoprazan-based second-line Helicobacter pylori eradication therapy in patients for whom vonoprazan-based first-line treatment failed JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 752 OP 753 DO 10.1136/gutjnl-2016-312028 VO 66 IS 4 A1 Yasumi Katayama A1 Kouji Toyoda A1 Yuumi Kusano A1 Toshikuni Suda A1 Shogo Adachi A1 Itsuo Terauchi A1 Shigeki Oka A1 Morio Takahashi A1 Masaya Tamano YR 2017 UL http://gut.bmj.com/content/66/4/752.abstract AB