Karl-Ludwig Kley, chief executive officer of Merck KGaA, gestures during a Bloomberg Television interview in London, U.K., on Friday, Feb. 7, 2014. Merck KGaA shares fell the most in more than four years in response to the unexpected departure of Chief Financial Officer Matthias Zachert, who helped turn the company around in the past two years. Photographer: Simon Dawson/Bloomberg via Getty Images
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