1 Object Research Systems Inc., Montréal, Québec, Canada. Electronic address: natalie.reznikov@mcgill.ca.
2 Department of Anatomy and Cell Biology, McGill University, Montréal, Québec, Canada.
3 Object Research Systems Inc., Montréal, Québec, Canada.
4 Department of Anatomy and Cell Biology, McGill University, Montréal, Québec, Canada; Faculty of Dentistry, McGill University, Montréal, Québec, Canada.