Margaret R. O'Leary, MD, is one of the first residency-trained and board-certified emergency physicians in the United States whose medical practice career spanned two decades. As the award-winning and best-selling author of more than fifteen books and many professional articles, Margaret's publishing career has spread over four decades. Today Margaret enjoys writing, big gardening, and playing her beautiful cellos.

Dennis S. O'Leary, MD, is the president emeritus of the Joint Commission, a former dean for clinical affairs and professor of internal medicine at the George Washington University, and the hospital spokesman in the aftermath of the assassination attempt on President Reagan's life in 1981. Dennis is also the grandson of Dr. Abraham Sophian, a central figure in The Texas Meningitis Epidemic (1911-1913). Today Dennis is a keen sports fan who also enjoys thriller novels and crossword puzzles.