Tumor Biology and Immunology Yong Gu Lee, Isaac Marks, Madduri Srinivasarao, Ananda Kumar Kanduluru, Sakkarapalayam M. Mahalingam, Xin Liu, Haiyan Chu and Philip S. Low DOI: 10.1158/0008-5472.CAN-18-1834 Published January 2019 Abstract Most solid tumors are comprised of multiple clones that express orthogonal antigens, suggesting that novel strategies must be developed in order to adapt chimeric antigen receptor (CAR) T-cell therapies to treat heterogeneous solid tumors.