A comprehensive analysis of key immune checkpoint receptors on tumor-infiltrating T cells from multiple types of cancer by Li, X, Wang, R, Fan, P, Yao, X, Qin, L, Peng, Y, Ma, M, Asley, N, Chang, X, Feng, Y, Hu, Y, Zhang, Y, Li, C, Fanning, G, Jones, S, Verrill, C, Maldonado-Perez, D, Sopp, P, Waugh, C, Taylor, S, McGowan, S, Cerundolo, V, Conlon, C, McMichael, A, Lu, S, Wang, X, Li, N, Dong, T