1. College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, Shandong, China
2. Linyi Traditional Chinese Medicine Hospital-Endoscopic Centre, Linyi, China
3. The First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan, Shandong, China
4. Department of Spleen and Stomach Diseases, The Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, Shandong, China