1. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Centre for Magnetic Resonance, Wuhan Institute of Physics and Mathematics, the Chinese Academy of Sciences, Wuhan 430071, P. R. China, Graduate University of the Chinese Academy of Sciences, Beijing 100049, P.R. China, Department of General Surgery, Union Hospital, Huazhong University of Science and Technology, Wuhan 430022, P. R. China, Department of General Surgery, Wuxi No.2 People's Hospital, Jiangsu 214002, P. R....