The vigorous immune microenvironment of microsatellite instable colon cancer is balanced by multiple counter-inhibitory checkpoints. Issue 2 (December 2015) - Losa, Nicolas; Cruise, Michael; Tam, Ada; Wick, Elizabeth; Hechenbleikner, Elizabeth; Taube, Janis; Blosser, Richard; Fan, Hongni; Wang, Hao; Luber, Brandon; Zhang, Ming; Papadopoulos, Nickolas; et al.