But if you're a Canadian Catholic, particularly in Quebec, you'll probably know of St. Marguerite D'Youville (and if you don't, get to know her and the other Canadian Saints and Blesseds HERE). Both Duffin and St. Marguerite are closely connected. Dr. Duffin, a Canadian hematologist, investigated the miracle that resulted in the canonization of St. Marguerite. (Read more about that HERE in an article by Charles Lewis in the National Post.) The professor of medicine penned a book called Medical Miracles: Doctors, Saints, and Healing in the Modern World (Oxford University Press, December 2008). The book examines 1400 miracles cited in canonizations going back to 1588. Catholic News Service spoke to the doctor in Rome: