1. Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon 999077, Hong Kong
2. Division of Life Science, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon 999077, Hong Kong
3. Department of Pharmacology and Therapeutics and the Myology Institute, University of Florida College of Medicine, Gainesville, Florida 32610-0267, United States
4. State Key Laboratory of Molecular Neuroscience, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon 999077, Hong Kong