Researchers performed a study to test the safety as well as the efficacy of nivolumab and nivolumab plus ipilimumab in Western patients with chemotherapy-refractory esophagogastric cancers.
https://www.mdlinx.com/journal-summaries/nivolumab-ipilimumab-esophagogastric-cancers-gastroesophageal-junction/2018/08/27/7542703?spec=oncology
Efficacy and safety of nivolumab and nivolumab plus ipilimumab in patients with metastatic esophagogastric cancer