Louis. Lawrence S. Mayer, M.B., M.S., Ph.D. is a scholar in residence in the Department of Psychiatry of Johns Hopkins University School of Medicine, a professor of statistics and biostatistics at Arizona State University, and a professor in the Mayo/ASU program in biomedical informatics. Paul R. McHugh, M.D. is University Distinguished Service Professor of Psychiatry at Johns Hopkins University School of Medicine and was for twenty-six years the psychiatrist-in-chief at the Johns Hopkins Hospital. He is the author or coauthor of several books, including, most recently, Try to Remember: Psychiatry’s Clash over Meaning, Memory, and Mind (Dana Press, 2008).