An exterior view of the Two Kingdom Street building which houses the headquarters of AstraZeneca, in the Paddington area of London, Friday, May 2, 2014. The board of pharmaceutical company AstraZeneca on Friday rejected drug maker Pfizer's sweetened takeover offer. Pfizer earlier in the day said it is offering 50 pounds ($84) a share in cash and stock, a 7.3 increase on a previous bid. The offer values AstraZeneca at $106 billion. (AP Photo/Matt Dunham)
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