1. Third Department of Geriatrics, Hebei General Hospital, Shijiazhuang, Hebei, China (mainland)
2. Third Department of Geriatrics, Hebei General Hospital, Shijiazhuang, Hebei, China (mainland)
3. Department of Respiratory Medicine, Hebei General Hospital, Shijiazhuang, Hebei, China (mainland)
4. International Department, Children's Hospital of Hebei Province, Shijiazhuang, Hebei, China (mainland)
5. Third Department of Neurology, Hebei General Hospital, Shijiazhuang, Hebei, China (mainland)
6. Department of General Medicine, Hebei General Hospital, Shijiazhuang, Hebei, China (mainland)