1. Study Office of Pediatric and Thoracic Surgery, Hebei Medical University, Shijiazhuang, People’s Republic of China
2. Department of Pediatric Surgery, Children’s Hospital of Hebei Province, Shijiazhuang, People’s Republic of China
3. Department of Thoracic Surgery, Hebei General Hospital, Shijiazhuang, People’s Republic of China
4. Department of Pathology, Children’s Hospital of Hebei Province, Shijiazhuang, People’s Republic of China
5. Children's Disease and Health Research Center of Hebei Province, Shijiazhuang, People’s Republic of China