State Key Laboratory of Molecular Oncology, Cancer Institute & Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China. Division of Cancer Epidemiology and Genetics, National Cancer Institute (NCI), National Institutes of Health, Bethesda, Maryland, USA. Cancer Genome Research Laboratory, Division of Cancer Epidemiology and Genetics, Advanced Technology Program, SAIC-Frederick Inc., NCI-Frederick, Frederick, MD, USA. Department of Pathology, Cancer Research Center, Basic Medical College, Xinxiang Medical University, Xinxiang, Henan, China. Henan Key Laboratory for Esophageal Cancer Research of The First Affiliated Hospital, Zhengzhou University, Zhengzhou, Henan, China. Department of Oncology, Pathology, Clinical Laboratory and Respiratory Medicine, The First Affiliated Hospital, Henan University of Science and Technology, Luoyang, Henan, China. Department of Thoracic Surgery, Cancer Institute & Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China. Key Laboratory of Dermatology, Anhui Medical University, Anhui, Hefei, China. Department of Epidemiology and Biostatistics, Cancer Center, Nanjing Medical University, Nanjing, China. Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University School of Oncology, Beijing Cancer Hospital & Institute, Beijing, China. State Key Laboratory of Oncology in Southern China. Department of Experimental Research, Sun Yat-Sen University Cancer Center, Guangzhou, China. Laboratory of Cancer Molecular Genetics, Medical College of Soochow University, Suzhou, China. Department of Medicine, Vanderbilt University, Nashville, Tennessee, USA. Vanderbilt-Ingram Cancer Center, Vanderbilt University, Nashville, Tennessee, USA. University of Pittsburgh Cancer Institute, Pittsburg, PA, USA. Anyang Tumor Hospital, Anyang, Henan, China. Department of Basic Oncology and Pathology at College of Medicine, Zhengzhou University, Zhengzhou, Henan, China. Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA. Shanxi Cancer Hospital, Taiyuan, Shanxi, China. Department of Epidemiology, Cancer Institute & Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China. Shanghai Cancer Institute, Shanghai, People's Republic of China. Duke-National University of Singapore, Graduate Medical School, Singapore. Key Laboratory for Environment and Health (Ministry of Education), School of Public Health, Huazhong University of Sciences and Technology, Wuhan, China. Information Management Services Inc., Silver Spring, Maryland, USA. Department of Medical Oncology, Tumor Hospital of Linzhou, Linzhou, Henan, China. Department of Pathology and Thoracic Surgery, Centre for Health Screening and Endoscopy, Cixian Hospital, Cixian, Hebei, China. Department of Gastroenterology, Henan Provincial People's Hospital, Zhengzhou, Henan, China. Department of Hematology, Henan Provincial People's Hospital, Zhengzhou, Henan, China. Central Laboratory, Henan Provincial People's Hospital, Zhengzhou, Henan, China. Department of Epidemiology, Harvard School of Public Health, Boston, MA, USA. Department of Basic Oncology, Pathology and Gastroenterology, The Second Affiliated Hospital, Zhengzhou University, Zhengzhou, Henan, China. Department of Oncology, The Second Affiliated Hospital of Nanyang Medical College, Nanyang, Henan, China. Department of Radiotherapy, Pathology and Pediatrics, Central Hospital of Xinxiang, Xinxiang, Henan, China. Department of Thoracic Surgery, Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, China. Department of Thoracic Surgery and Radiotherapy, Cancer Hospital of Henan Province, Zhengzhou, Henan, China. Department of Internal Mongolia Medicine, The Affiliated Hospital, Inner Mongolia Medical College, Huhhot, Inner Mongolia, China. Department of Biotechnology, Ningxia Medical University, Yinchuan, Ningxia, China. Department of Thoracic Surgery, Tumor Hospital of Shaanxi Province, Xi'an, Shaanxi, China. Department of Thoracic and Cardiovascular Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China. Department of Oncologic Pathology, Medical College of Shantou University, Shantou, Guangdong, China. Department of Biochemistry and Molecular Biology, Medical College of Shantou University, Shantou, Guangdong, China. Department of Oncology, Puyang City Oil Field General Hospital, Puyang, Henan, China. Department of Pathology and Thoracic Surgery, Linzhou Esophageal Cancer Hospital, Linzhou, Henan, China. Department of Gastroenterology and Thoracic Surgery, The First People's Hospital of Shangqiu, Shangqiu, Henan, China. Department of Gastroenterology, Beijing Tongren Hospital Affiliated to Capital Medical University, Beijing, China. Department of Oncology, Xinyang Central Hospital, Xinyang, Henan, China. State Key Laboratory of Genetic Resource and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China. Department of Pathology, Shihezi University School of Medicine, Shihezi, Xinjiang, China. Department of Thoracic Surgery, Xinjiang Medical University, Urumqi, Xinjiang, China. Medical Research Center, The First Affiliated Hospital, Xinjiang Medical University, Urumqi, Xinjiang, China. Institute of Hematologic Disease, Changzhi Medical University, Changzhi, Shanxi, China. Department of Pathology, Changzhi Medical University, Changzhi, Shanxi, China. Department of Surgery, Hebi Dahejian Hospital, Hebi, Henan, China. Anyang District Hospital, Anyang, Henan, China. Surgical Department of Shanghai Public Health Clinical Center, Fudan University, Shanghai, China. Department of Anatomy, the Second Military Medical University of Chinese PLA, Shanghai, China. Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China. Medical College of Wisconsin, Cancer Research Center, Milwaukee, WI, USA. National Laboratory of Molecular Oncology, Cancer Institute & Hospital, CAMS, Beijing, China. College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang, China. University of Medicine and Dentistry of New Jersey, Newark, NJ, USA.