1 Tsinghua Shenzhen International Graduate School, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, Institute of Optical Imaging and Sensing, Shenzhen 518055, P. R. China
2 Tsinghua University, Department of Physics, Beijing 100084, P. R. China
3 Fujian Medical University, Department of Pathology and Institute of Oncology, School of Basic Medical Sciences, Fuzhou 350014, P. R. China
4 Fujian Medical University, Diagnostic Pathology Center, Fuzhou 350014, P. R. China
5 Fujian Medical University, Mengchao Hepatobiliary Hospital, Fuzhou 350014, P. R. China