© Reuters. FILE PHOTO: The Pfizer logo is pictured on their headquarters building in the Manhattan borough of New York City, New York, U.S., November 9, 2020. REUTERS/Carlo Allegri/File Photo/File Photo
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(Reuters) – The US Federal Trade Commission (FTC) has sought additional information and documentary material related to Pfizer (NYSE:)’s proposed acquisition of Seagen Inc, Seagen said on Friday.