09/10/2009 05:12 am ET | Updated May 25, 2011

Redheads More Sensitive To Pain: Study

"The reason we studied redheads in the beginning, it was essentially an urban legend in the anesthesia community saying redheads were difficult to anesthetize," Dr. Sessler said. "This was so intriguing we went ahead and studied it. Redheads really do require more anesthesia, and by a clinically important amount."

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