National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [81472465, 81772842]; Natural Science Foundation of GuangxiNational Natural Science Foundation of Guangxi Province [2015GXNSFEA139003]; NATIONAL INSTITUTE OF DIABETES AND DIGESTIVE AND KIDNEY DISEASESUnited States Department of Health & Human ServicesNational Institutes of Health (NIH) - USANIH National Institute of Diabetes & Digestive & Kidney Diseases (NIDDK) [P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579, P30DK020579] Funding Source: NIH RePORTER