1. Department of Physiology, Shandong University School of Medicine, Jinan, Shandong, People’s Republic of China;
2. Department of Physiology and Pharmacology, University of Western Ontario, London, Ontario, Canada;
3. Robarts Research Institute, University of Western Ontario, London, Ontario, Canada;
4. Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada;
5. Department of Physiology, University of Toronto, Toronto, Ontario, Canada; and
6. Department of Pharmacology, Shandong University School of Medicine, Jinan, Shandong, People’s Republic of China