1. Department of Internal Medicine-Neurology, Linyi Central Hospital, Linyi 276400, Shandong Province, China
2. Endoscopy Room, The Fourth People’s Hospital of Jinan, Jinan 250031, Shandong Province, China
3. Department of Equipment, Tai’an Maternal and Child Health Hospital, Tai’an 271000, Shandong Province, China
4. Department of Nursing, The First Affiliated Hospital of Shandong First Medical University, Shandong Province Qianfoshan Hospital, Jinan 250014, Shandong Province, China