Center of Growth, Metabolism and Aging, Key Laboratory of Biological Resources and Ecological Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, China. Department of Laboratory Medicine, West China Second University Hospital, Sichuan University, Chengdu, 610041, China. Pathology Department, The Second People's Hospital of Jingmen, Jingmen, 448000, China. Department of Pediatric Surgery, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China. West China School of Nursing, Sichuan University, Chengdu, 610041, Sichuan, China. Department of General Surgery, The Second People's Hospital of Jingmen, Jingmen, 448000, China. Center of Growth, Metabolism and Aging, Key Laboratory of Biological Resources and Ecological Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, China. lichenghua@scu.edu.cn.