1. Department of General Surgery, Guangzhou Digestive Disease Center, Guangzhou First People's Hospital, School of Medicine South China University of Technology Guangzhou Guangdong 510180 China
2. Chronic Disease Laboratory, Institutes for Life Sciences and School of Medicine South China University of Technology Guangzhou Guangdong 510006 China
3. Center of Excellence, Becton Dickinson Medical Devices (Shanghai) Co. Ltd and South China University of Technology Guangzhou Guangdong 510006 China
4. Becton Dickinson Medical Devices (Shanghai) Co., Ltd Guangzhou Guangdong 510180 China
5. BD Biosciences San Jose California 95131 USA
6. Guangzhou Regenerative Medicine and Health Guangdong Laboratory Guangzhou 510005 China