UPDATE 1-AstraZeneca's immunotherapy drug wins key lung cancer approval By: Reuters: Company News February 17, 2018 at 05:07 AM EST * Rival BMS, Merck, Roche drugs approved for later disease (Adds details on competition, size of market opportunity) Read More >> Related Stocks: Astrazeneca Plc ADR Bristol-Myers Squibb Merck & Co Rogers Corp