1. Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, United States
2. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan National Laboratory for Optoelectronics, National Center for Magnetic Resonance in Wuhan, Key Laboratory of Magnetic Resonance in Biological Systems, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China
3. Department of Biomedical Engineering, Duke University, Durham, North Carolina 27708, United States