Jerome Groopman, M.D., holds the Dina and Raphael Recanati Chair of Medicine at Harvard Medical School and is chief of experimental medicine at Beth Israel Deaconess Medical Center in Boston. A staff writer for The New Yorker, he is the author of How Doctors Think, The Anatomy of Hope, Second Opinions, The Measure of Our Days, and other books.
TIM FOLGER is a contributing editor at Discover and writes about science for several magazines.