1. Department of Pediatrics, The First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, China (mainland)
2. Department of Statistics, School of Public Health, Kunming Medical University, Kunming, Yunnan, China (mainland)
3. Yunnan Center for Disease Control and Prevention, Kunming, Yunnan, China (mainland)
4. Department of Clinical Laboratory Medicine, The First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, China (mainland)