CHICAGO – Speaking at the American Society of Clinical Oncology meeting, John Heymach of Houston's MD Anderson Cancer Center, called new phase III data with Merck & Co. Inc.'s Keytruda (pembrolizumab) "a double whammy" of upside for advanced non-small-cell lung cancer (NSCLC) patients: non-chemotherapy benefit with lower side effects. "An era in which chemotherapy was the only option for NSCLC patients has drawn to a close," he said.