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. From the NEJM Archive. Copyright © 2009 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. From the NEJM Archive. Copyright © 2009 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. From the NEJM Archive. Copyright © 2009 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. From the NEJM Archive. Copyright © 2009 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. From the NEJM Archive. Copyright © 2009 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. From the NEJM Archive. Copyright © 2009 Massachusetts Medical Society. All rights reserved.

Histamine (second of two parts).

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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