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

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Hammergren, the CEO of pharmaceutical drug distributor McKesson Corp.

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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.

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Drury pointed out that while Hewlett-Packard (nyse: HPQ - news - people ) 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.

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