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Sanofi CEO Christopher A. Viehbacher, left, and President of Sanofi's Global Research and Development, Dr. Elias Zerhouni pose for photographers as they arrive for Sanofi's annual results in Paris, Thursday, Feb. 6, 2014. The French drug maker said Thursday its earnings soared in the fourth quarter as lower restructuring costs offset a hefty charge related to one of its key multiple sclerosis treatments. (AP Photo/Michel Euler)

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