Sammies winner: The medical detective

Monday - 9/19/2011, 6:04pm EDT

Dr. William Gahl, founding director, Undiagnosed Diseases Program at NIH

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When someone gets a serious disease and doctors don't know what it is, they call Dr. William Gahl, one of America's leading medical detectives.

Dr. Gahl is the founding director of the Undiagnosed Diseases Program at the National Institute of Health.

His work has made him the 2011 Service to America Medal winner in the Science and Environment category.