H. Gilbert Welch is an academic physician, a professor at Dartmouth Medical School, and a nationally recognized expert on the effects of medical testing. He has been published in the Los Angeles Times, New York Times, Washington Post, and Wall Street Journal, and has appeared on Today. Dr. Welch is the author of three previous books, including the highly acclaimed Overdiagnosed. He lives in Thetford, Vermont.

Author photo by Mark Washburn