1. Department of Elderly Digestion, Shaanxi Provincial People’s Hospital, Xi'an, Shaanxi, China (mainland)
2. Department of Elderly Digestion, Shaanxi Provincial People’s Hospital, Xi’an, Shaanxi, China (mainland)
3. Department of Ophthalmology, Shaanxi Provincial People’s Hospital, Xi’an, Shaanxi, China (mainland)
4. Department of Endocrinology, Shaanxi Provincial People’s Hospital, Xi’an, Shaanxi, China (mainland)