1. Department of Pediatrics People's Hospital of Chongqing Banan District Chongqing China
2. Department of Respiratory Medicine Children's Hospital of Chongqing Medical University Chongqing China
3. Children's Hospital of Chongqing Medical University National Clinical Research Center for Child Health and Disorders Chongqing China
4. Children's Hospital of Chongqing Medical University Ministry of Education Key Laboratory of Child Development and Disorders Chongqing China
5. Children's Hospital of Chongqing Medical University China International Science and Technology Cooperation Base of Child Development and Critical Disorders Chongqing China
6. Department of Epidemiology The University of Texas Health Science Center at Houston (UTHealth) School of Public Health Dallas Texas USA
7. Department of Epidemiology, Fay W. Boozman College of Public Health University of Arkansas for Medical Sciences Little Rock Arkansas USA