1. Department of Physiology, The University of Western Ontario, London, Ontario, Canada N6A 5C1
2. Retinoid Research, Department of Chemistry and Department of Biology, Allergan Inc., Irvine, CA 92623
3. Department of Pharmacology and Department of Oncology, Faculty of Medicine and Dentistry, The University of Western Ontario, London, Ontario, Canada N6A 5C1
4. School of Dentistry, Faculty of Medicine and Dentistry, The University of Western Ontario, London, Ontario, Canada N6A 5C1