William Y. Go, M.D., Ph.D., has been appointed senior director of Clinical Development and Jeff Aycock has been named senior director of Clinical Operations at Kite Pharma.    Prior to joining the company, Dr. Go held senior positions of increasing responsibility at Amgen, most recently as U.S. medical lead for Vectibix, medical director in Global Development. Dr. Go has co-authored 25 peer-reviewed articles and presentation abstracts.    Mr. Aycock has more than 17 years of drug development exp...