Board of Directors

Barbara Desoer
Barbara J. Desoer
Chief Executive Officer, Citibank, N.A.
Barbara J. Desoer has been one of our directors since October 2015. Ms. Desoer currently serves as the chief executive officer and a member of the board of directors of Citibank, N.A., a wholly owned subsidiary of Citigroup Inc. and a diversified global financial services company, since April 2014.
Paul J. Diaz
Paul J. Diaz
Operating Partner, Cressey & Company
Paul J. Diaz has been one of our directors since July 2007. Mr. Diaz currently serves as an Operating Partner of Cressey & Company, a private investment firm focused exclusively on investing in and building health care businesses. Mr. Diaz also serves as a director of Kindred Healthcare, Inc.
John  Nehra
John M. Nehra
Former General Partner, New Enterprise Associates
John M. Nehra has been one of our directors since November 2000. From 1989 until his retirement in August 2014, Mr. Nehra was affiliated with New Enterprise Associates (‘‘NEA’’), a venture capital firm, including, from 1993 until his retirement, as general partner of several of its affiliated
Phyllis Yale
Phyllis R. Yale
Senior Advisor, Bain & Company, Inc.
Phyllis R. Yale has been one of our directors since July 2016. Ms. Yale has been a Senior Advisor with Bain & Company, Inc. (“Bain”), a global management consulting firm, since July 2010. Ms. Yale was a partner with Bain from 1987 to July 2010, and was a leader in building Bain’s health care

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Jim Gustafson

Vice President, Investor Relations DaVita Inc.

601 Hawaii StreetEl Segundo, CA 90245

Phone:  (310) 536-2585