Efficacy and Safety of Lenvatinib (E7080/MK-7902) Plus Pembrolizumab (MK-3475) Plus Chemotherapy in Participants With Advanced/Metastatic Gastroesophageal Adenocarcinoma (MK-7902-015/E7080-G000-321/LEAP-015) ~70 mi. (Sakarya, Turkey, +131 more cities) Sakarya Universitesi Tip Fakultesi ( Site 2007) HER2 Negative Adenocarcinoma of the Gastroesophageal Junction, +2 more conditions CAPOX regimen, +3 more drugs chemotherapy, +2 more types