. . . . "Has Medicare+Choice reduced variation in the premiums and benefits offered by participating health plans? a review of Medicare+Choice plan payment methodology : hearing before the Subcommittee on Oversight and Investigations of the Committee on Energy and Commerce, House of Representatives, One Hundred Seventh Congress, first session, May 31, 2001"@en . . . . . . . . . . . . . . "Has Medicare+Choice reduced variation in the premiums and benefits offered by participating health plans? : a review of Medicare+Choice plan payment methodology : hearing before the Subcommittee on Oversight and Investigations of the Committee on Energy and Commerce, House of Representatives, One Hundred Seventh Congress, first session, May 31, 2001"@en . . .