Leerink Swann Downgrades Kythera Biopharmaceuticals To Market Perform By: Benzinga via Benzinga June 29, 2015 at 08:46 AM EDT Analysts at Leerink Swann downgraded Kythera Biopharmaceuticals Inc (NASDAQ: KYTH) from Outperform to Market Perform. Kythera ... Read More >>