Edward Lanphier, president and chief executive officer of Sangamo BioSciences, Inc., stands for a photograph next to Sangamo BioSciences signage outside of the lab in Point Richmond, California, U.S., on Tuesday, Feb. 2, 2011. Timothy Brown, 44, may be the only person cured of AIDS. His case has driven Sangamo BioSciences Inc. to develop a new form of gene therapy that may give others the same opportunity. Photographer: David Paul Morris/Bloomberg via Getty Images
Ian Read, chairman and chief executive officer of Pfizer Inc., left, and Brent Saunders, president and chief executive officer of Allergan Plc, stand for a photograph in front of Pfizer headquarters in New York, U.S., on Monday, Nov. 23, 2015. Pfizer Inc. and Allergan Plc agreed to combine in a record $160 billion deal, creating a drugmaking behemoth called Pfizer Plc with products from Viagra to Botox and a low-cost tax base. Photographer: Michael Nagle/Bloomberg via Getty Images
LONDON, ENGLAND - MARCH 30: (SUN NEWSPAPER OUT. MANDATORY CREDIT PHOTO BY DAVE J. HOGAN GETTY IMAGES REQUIRED) Stephen Hawking attends "Interstellar Live" at Royal Albert Hall on March 30, 2015 in London, England. (Photo by Dave J Hogan/Getty Images)
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