FILE- In this July 24, 2013, file photo a security guard walks in front of the GlaxoSmithKline building in Shanghai, China. Shares of Tesaro soared early Monday, Dec. 3, 2018, after GlaxoSmithKline said it would pay about $5.1 billion in cash to buy the cancer drugmaker. (AP Photo/Eugene Hoshiko, File)
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