T lymphocytes induce human cancer cells derived from solid malignant tumors to secrete galectin-9 which facilitates immunosuppression in cooperation with other immune checkpoint proteins ========================================================================================================================================================================================== * Stephanie Schlichtner * Inna M Yasinska * Gurprit S Lall * Steffen M Berger * Sabrina Ruggiero * Dietmar Cholewa * Nijas Aliu * Bernhard F Gibbs * Elizaveta Fasler-Kan * Vadim V Sumbayev