Nuclear IRF-1 expression as a mechanism to assess “Capability” to express PD-L1 and response to PD-1 therapy in metastatic melanoma ======================================================================================================================================= * James W. Smithy * Lauren M. Moore * Vasiliki Pelekanou * Jamaal Rehman * Patricia Gaule * Pok Fai Wong * Veronique M. Neumeister * Mario Sznol * Harriet M. Kluger * David L. Rimm