Government of the People's Republic of China - Department of Gastroenterology, Government of the People's Republic of China - College of Biomedical Engineering and Imaging Medicine, Government of the People's Republic of China - Department of Nuclear Medicine, Government of the People's Republic of China - Department of Gastroenterology, People's Hospital of Chongqing Hechuan - Department of Gastroenterology, Government of the People's Republic of China - Department of Medical Engineering, Government of the People's Republic of China - College of Biomedical Engineering and Imaging Medicine, Government of the People's Republic of China - College of Biomedical Engineering and Imaging Medicine, Government of the People's Republic of China - Department of Internal Medicine, Government of the People's Republic of China - Pulmonary and Critical Care Medicine Center, Government of the People's Republic of China - Department of Cardiovascular Medicine, Government of the People's Republic of China - Department of Respiratory Medicine, Government of the People's Republic of China - Department of Respiratory Medicine, Government of the People's Republic of China - Department of Gastroenterology, Government of the People's Republic of China - Department of Gastroenterology, Government of the People's Republic of China - Department of Gastroenterology, Government of the People's Republic of China - Department of Gastroenterology, Government of the People's Republic of China - Department of Gastroenterology, Government of the People's Republic of China - Department of Gastroenterology, Government of the People's Republic of China - College of Biomedical Engineering and Imaging Medicine, Government of the People's Republic of China - Department of Gastroenterology, Government of the People's Republic of China - Department of Gastroenterology, Government of the People's Republic of China - Department of Gastroenterology and Government of the People's Republic of China - Department of Gastroenterology