1. Diabetes Ambulatory Care Center, Department of Medicine & Geriatrics, United Christian Hospital, Hong Kong, China
2. Department of Biochemistry, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
3. Podiatry Department, United Christian Hospital, Hong Kong, China
4. Department of Orthopaedics and Traumatology, United Christian Hospital, Hong Kong, China