1. Department of Medicine and Geriatrics, Pok Oi Hospital, Hong Kong
2. Department of Medicine and Geriatrics, Fung Yiu King Hospital, Hong Kong
3. Department of Medicine and Geriatrics, Kwong Wah Hospital, Hong Kong
4. Department of Medicine and Geriatrics, Ruttonjee & Tang Shiu Kin Hospitals, Hong Kong
5. Department of Medicine, Alice Ho Nethersole Hospital, Hong Kong
6. Department of Medicine and Geriatrics, Tuen Mun Hospital, Hong Kong
7. Department of Medicine and Geriatrics, Caritas Medical Centre, Hong Kong