1. Department of Respiratory and Critical Care Medicine, the Second Affiliated Hospital of Shaanxi University of Chinese medicine, Xianyang, China
2. Health management (preventive treatment) center, Binzhou Hospital of Traditional Chinese Medicine, Binzhou, China
3. Department of Gastroenterology, Binzhou People’s Hospital, Binzhou, China
4. Department of Biophysics, PGIMER, Chandigarh, India