1 Department of Pediatrics and Neonatology, The First Affiliated Hospital of Fujian Medical University, Fuzhou, 350000, China.
2 Department of Pediatrics and Neonatology, The First Affiliated Hospital of Fujian Medical University, Fuzhou, 350000, China. Electronic address: liuyjunhongljh883@126.com.
3 Department of Epidemiology and Health Statistics, School of Public Health, Fujian Medical University, Fuzhou, 350122, China.