1. Department of Chemistry, The Hong Kong University of Science and Technology, Kowloon, Hong Kong
2. Department of Chemistry, Stanford University, Stanford, California 94305, USA
3. State Key Laboratory of Molecular Neuroscience, Center of System Biology and Human Health, The Hong Kong University of Science and Technology, Kowloon, Hong Kong
4. The Hong Kong University of Science and Technology-Shenzhen Research Institute, Hi-Tech Park, Nanshan, Shenzhen, China