652 NT-I7 (efineptakin alfa), a long-acting IL-7, in combination with pembrolizumab improves T cell fitness in heavily pretreated subjects with gastrointestinal tumors - Cara Haymaker; Aung Naing; Minal Barve; Marya Chaney; Se Hwan Yang; Siyoung Lee; Byung Ha Lee; Sara Ferrando-Martinez; Hirva Mamdani; Richard D Kim; Meredith Pelster; Mohamed Derbala; et al. (Journal for ImmunoTherapy of Cancer, 2023)