Prieto Prieto PA PA ,  Yang Yang JC JC ,  Sherry Sherry RM RM ,  Hughes Hughes MS MS ,  Kammula Kammula US US ,  White White DE DE ,  CTLA-4 Blockade with Ipilimumab: Long-Term Follow-up of 177 Patients with Metastatic Melanoma CTLA-4 Blockade with Ipilimumab: Long-Term Follow-up of 177 Patients with Metastatic Melanoma . This evidence concerns the gene CTLA4 and melanoma.