Hammergren is Chairman, President and Chief Executive Officer of McKesson Corp.

FORBES: Advice To Health-Care Providers: Forget The Debate, Heal Thyselves

Hammergren, the CEO of pharmaceutical drug distributor McKesson Corp.

WSJ: NYC pension funds seeking ouster of 2 HP directors

Drury pointed out that while Hewlett-Packard is one of America's largest and best-known public corporations, its dysfunctional board includes only one chief executive officer of another public company: John Hammergren of McKesson Corp.

FORBES: Magazine Article