1. College of Public Health; Zhengzhou University; Zhengzhou Henan China
2. School of Public Health; Xinxiang Medical University; Xinxiang Henan China
3. Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine; Xinxiang Medical University; Xinxiang Henan China
4. Department of Immunology and Duke Cancer Institute; Duke University Medical Center; Durham North Carolina USA
5. Zhengzhou Center for Disease Control and Prevention; Zhengzhou Henan China
6. Department of Pulmonary Medicine; The First Affiliated Hospital of Zhengzhou University; Zhengzhou Henan China