222 Increased PD-L1 tumor expression correlates with high rate of response to PD-1 inhibitors in patients with unresectable, recurrent, and metastatic cutaneous squamous cell carcinoma
222 Increased PD-L1 tumor expression correlates with high rate of response to PD-1 inhibitors in patients with unresectable, recurrent, and metastatic cutaneous squamous cell carcinoma