00341pab a2200133 454500008004000000100002300040245004200063260000900105300001300114362000800127650002000135700002400155773002800179180718b2004   xxu||||| |||| 00| 0 eng d  aPorter, Michael E.  aRedefining competition in health care  c2004  ap.65-76.  aJun  aHealth services  aTeirberg, Elizabeth  aHarvard Business Review