The New England Journal of Medicine Downloaded from nejm.org at PENN STATE UNIVERSITY on November 14, 2015. For personal use only. No other uses without permission. Copyright © 1991 Massachusetts Medical Society. All rights reserved.

The New England Journal of Medicine Downloaded from nejm.org at PENN STATE UNIVERSITY on November 14, 2015. For personal use only. No other uses without permission. Copyright © 1991 Massachusetts Medical Society. All rights reserved.

The New England Journal of Medicine Downloaded from nejm.org at PENN STATE UNIVERSITY on November 14, 2015. For personal use only. No other uses without permission. Copyright © 1991 Massachusetts Medical Society. All rights reserved.

The New England Journal of Medicine Downloaded from nejm.org at PENN STATE UNIVERSITY on November 14, 2015. For personal use only. No other uses without permission. Copyright © 1991 Massachusetts Medical Society. All rights reserved.

The New England Journal of Medicine Downloaded from nejm.org at PENN STATE UNIVERSITY on November 14, 2015. For personal use only. No other uses without permission. Copyright © 1991 Massachusetts Medical Society. All rights reserved.

Efforts to address the problem of physician self-referral.

The New England Journal of Medicine Downloaded from nejm.org at PENN STATE UNIVERSITY on November 14, 2015. For personal use only. No other uses witho...
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