>>>to investments and other ownership stakes doctors held in companies.
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>So physicians have investments and ownership stakes in companies, and receive dividends and other profits? I get the argument that physicians owning facilities or companies whose services or products they prescribe can creates a risk, but if you want to create special limits on physicians investing in services or products they believe in, you'll need to compensate them some other way. How?

Nope. In the case of possible conflict of interest another measure - information - has been introduced to some stockholders. Similar rules would be a start.