1. Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, P.R. China
2. Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education & Fujian Provincial Key Laboratory of Photonics Technology, Fujian Normal University, Fuzhou, P.R. China
3. Fujian Provincial Hospital, Teaching Hospital of Fujian Medical University, Fuzhou, Fujian, P.R. China
4. Fujian Provincial Cancer Hospital, Teaching Hospital of Fujian Medical University, Fuzhou, Fujian, P.R. China
5. School of Applied and Engineering Physics, Cornell University, Ithaca, New York, USA