FILE - This Tuesday, Oct. 16, 2012, file photo, shows a portion of the UnitedHealth Group Inc.'s campus in Minnetonka, Minn. UnitedHealth Group Inc. said Wednesday, Dec. 6, 2017, that its Optum segment will buy the DaVita Medical Group from DaVita Inc. in a cash deal expected to close next year. (AP Photo/Jim Mone, File)
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