The New England Journal of Medicine Downloaded from nejm.org at PENN STATE UNIVERSITY on November 22, 2015. For personal use only. No other uses without permission. From the NEJM Archive. Copyright © 2009 Massachusetts Medical Society. All rights reserved.

Letter: Massachusetts Medical Society and Department of Public Health regulations.

The New England Journal of Medicine Downloaded from nejm.org at PENN STATE UNIVERSITY on November 22, 2015. For personal use only. No other uses witho...
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