AXL and head and neck squamous cell carcinoma: Thecombined MER and AXL therapies led to a more potent blockade of downstreamsignaling and resulted in synergistic growth inhibition in human TNBCand HNSCC xenograft models.9 Using mousemodels of murine breast tumors, it is demonstrated that both MER andAXL receptors cooperate to promote breast cancer progression and immuneescape.