Phase I/II clinical trial of a helper peptide vaccine plus PD-1 blockade in PD-1 antibody-naïve and PD-1 antibody-experienced patients with melanoma (MEL64) ============================================================================================================================================================= * Rick D Vavolizza * Gina R Petroni * Ileana S Mauldin * Kimberly A Chianese-Bullock * Walter C Olson * Kelly T Smith * Lynn T Dengel * Kathleen Haden * William W Grosh * Varinder Kaur * Nikole Varhegyi * Elizabeth M Gaughan * Craig L Slingluff, Jr