Pfizer Inc.
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FILE - This Monday, Nov. 23, 2015, file photo, shows the Pfizer logo on display at the company's world headquarters in New York. Pfizer Inc. (PFE) on Tuesday, Aug. 1, 2017, reported second-quarter profit of $3.07 billion. (AP Photo/Mark Lennihan, File)

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FILE - In this Monday, Nov. 23, 2015, file photo, flags fly in front of Pfizer World Headquarters, in New York. Pfizer Inc. reports earnings, Tuesday, May 2, 2017. (AP Photo/Mark Lennihan, File)

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FILE - In this Monday, Nov. 23, 2015, file photo, a woman passes Pfizer's world headquarters, in New York. Pfizer Inc. (PFE) on Tuesday, Jan. 31, 2017, reported fourth-quarter net income of $775 million, after reporting a loss in the same period a year earlier. (AP Photo/Mark Lennihan, File)

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FILE - In this Jan. 25, 2009 file photo, Pfizer's world headquarters is shown in New York. Pfizer Inc., the world's largest pharmaceutical company by revenue, said Tuesday, Oct. 12, 2010, it will buy pain drug maker King Pharmaceuticals Inc. for $3.6 billion in cash. (AP Photo/Mark Lennihan, File)