Almost two-thirds (60%) of department chairs had some form of 
personal relationship with industry, including serving as a 
consultant (27%), a member of a scientific advisory board (27%), a 
paid speaker (14%), an officer (7%), a founder (9%), or a member of 
the board of directors (11%).
...
More than two-thirds of chairs perceived that having a relationship 
with industry had no effect on their professional activities

http://jama.ama-assn.org/cgi/content/abstract/298/15/1779

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