1. Medical Research Office, the Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou, Henan, China
2. Department of Prenatal Diagnosis Center, the Third Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
3. Henan Children’s Hospital, Zhengzhou Children’s Hospital, Children’s Hospital Affiliated to Zhengzhou University, Zhengzhou, Henan, China
4. College of Public Health, Zhengzhou University, Zhengzhou, Henan, China
5. Key Laboratory of Tumor Epidemiology of Henan Province, State Key Laboratory of Esophageal Cancer Prevention & Treatment, Zhengzhou University, Zhengzhou, Henan, China