 EL SEGUNDO CULVER CITY, Calif.--BUSINESS WIRE--NantKwest, Inc. NASDAQ: NK, a clinical-stage, natural killer cell-based therapeutics company, and ImmunityBio, Inc., a privately-held immunotherapy company, today announced early interim results of its PD-L1 t-haNK protocols showing median survival rates more than doubled that of the historic rate in patients with advanced metastatic pancreatic cancer for which no other FDA-approved treatment exists. These trials, which were based on the orig 