1. Department of Geriatrics, Nantong First Geriatric Hospital, Nantong City, China
2. Department of Geriatrics, Harbin Second Hospital, Harbin, China
3. Cadre Ward of The First Affiliated Hospital of Harbin Medical University, Harbin City, China
4. Department of Traditional Chinese Medicine, Nantong First Elderly Hospital, Nantong City, China
5. Department of Otolaryngology, East Hospital, Shanghai Sixth People's Hospital, Nanhui New City, China