1. National Center for Magnetic Resonance in Wuhan, Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, P.R. China
2. University of Chinese Academy of Sciences, Beijing 100049, P.R. China
3. NUS Environmental Research Institute, National University of Singapore, 117411 Singapore
4. Department of Biological Sciences, National University of Singapore, 117411 Singapore
5. Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892-0520, United States
6. National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
7. School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, P.R. China