1. Department of Gastrointestinal Surgery, the Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510630, China
2. Central Laboratory, the Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510630, China
3. Medprin Regenerative Medical Technologies Co. Ltd Guangzhou, Guangdong 510630, China