1. Faculty of Dental Medicine and Oral Health Sciences (A.P., M.M.), McGill University, Montreal, Québec, Canada.
2. Department of Anatomy and Cell Biology (K.B., M.M.), McGill University, Montreal, Québec, Canada.
3. Department of Medicine (M.M.), McGill University, Montreal, Québec, Canada.
4. Shriners Hospital for Children, Montreal, Québec, Canada (M.M.).