{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T20:54:56Z","timestamp":1790888096045,"version":"4.1.0"},"reference-count":7,"publisher":"American Society of Clinical Oncology (ASCO)","content-domain":{"domain":["ascopubs.org"],"crossmark-restriction":true},"short-container-title":["J Clin Oncol"],"abstract":"<jats:p>\n                    <jats:boxed-text orientation=\"portrait\" position=\"float\" specific-use=\"update-notice\">\n                      <jats:p>\n                        <jats:bold>This guideline has been updated.<\/jats:bold>\n                      <\/jats:p>\n                      <jats:p>\n                        This ASCO Living Guideline is reviewed on an eight-week cycle. Please see the\n                        <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"https:\/\/ascopubs.org\/guidelines\/immunotherapy-and-targeted-therapy-advanced-gastroesophageal-cancer\">online dynamic version<\/jats:ext-link>\n                        for the latest updates.\n                      <\/jats:p>\n                    <\/jats:boxed-text>\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:italic toggle=\"yes\">Living guidelines are developed for selected topic areas with rapidly evolving evidence that drives frequent change in recommended clinical practice. Living guidelines are updated on a regular schedule by a standing expert panel that systematically reviews the health literature on a continuous basis, as described in the<\/jats:italic>\n                    <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"https:\/\/www.asco.org\/practice-patients\/guidelines\/guideline-methodology\">\n                      <jats:italic toggle=\"yes\">ASCO Guidelines Methodology Manual<\/jats:italic>\n                    <\/jats:ext-link>\n                    <jats:italic toggle=\"yes\">. ASCO Living Guidelines follow the<\/jats:italic>\n                    <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"https:\/\/www.asco.org\/rwc\">\n                      <jats:italic toggle=\"yes\">ASCO Conflict of Interest Policy Implementation for Clinical Practice Guidelines<\/jats:italic>\n                    <\/jats:ext-link>\n                    <jats:italic toggle=\"yes\">\n                      . Living Guidelines and updates are not intended to substitute for independent professional judgment of the treating clinician and do not account for individual variation among patients. See appendix for disclaimers and other important information (\n                      <jats:xref ref-type=\"app\">Appendix 1<\/jats:xref>\n                      and\n                      <jats:xref ref-type=\"app\">Appendix 2<\/jats:xref>\n                      , online only). Updates are published regularly and can be found on the\n                    <\/jats:italic>\n                    <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"https:\/\/ascopubs.org\/guidelines\/immunotherapy-and-targeted-therapy-advanced-gastroesophageal-cancer\">\n                      <jats:italic toggle=\"yes\">ASCO Publications website<\/jats:italic>\n                    <\/jats:ext-link>\n                    .\n                  <\/jats:p>","DOI":"10.1200\/jco-26-01944","type":"journal-article","created":{"date-parts":[[2026,8,17]],"date-time":"2026-08-17T20:00:06Z","timestamp":1786996806000},"update-policy":"https:\/\/doi.org\/10.1200\/crossmark","source":"Crossref","is-referenced-by-count":1,"title":["Immunotherapy and Targeted Therapy for Advanced Gastroesophageal Cancer: ASCO Living Guideline, Version 2026.1.2"],"prefix":"10.1200","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6913-9655","authenticated-orcid":false,"given":"Manish A.","family":"Shah","sequence":"first","affiliation":[{"name":"Weill Cornell Medicine, New York, NY"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7716-4271","authenticated-orcid":false,"given":"Jacob S.","family":"Marzalik","sequence":"additional","affiliation":[{"name":"JSM Research Services, LLC, Arlington, VA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4370-7757","authenticated-orcid":false,"given":"Erin B.","family":"Kennedy","sequence":"additional","affiliation":[{"name":"American Society of Clinical Oncology, Alexandria, VA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1362-4387","authenticated-orcid":false,"given":"Dana","family":"Deighton","sequence":"additional","affiliation":[{"name":"Melanoma 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CA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5196-3630","authenticated-orcid":false,"given":"Kohei","family":"Shitara","sequence":"additional","affiliation":[{"name":"National Cancer Center East, Kashiwa, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Melani","family":"Vincelli","sequence":"additional","affiliation":[{"name":"Debbie's Dream Foundation, Plantation, FL"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0005-9747-6121","authenticated-orcid":false,"given":"Lakshmi","family":"Rajdev","sequence":"additional","affiliation":[{"name":"Icahn School of Medicine, Mount Sinai, New York, 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