1. Department of Medicine and Therapeutics, Prince of Wales Hospital, The Chinese University of Hong Kong, 30-32 Ngan Shing Street, Shatin, Hong Kong
2. Department of Rheumatology, Hospital Selayang, Lebuhraya Selayang-Kepong, 68100 Batu Caves, Malaysia
3. Department of Chemical Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, 30-32 Ngan Shing Street, Shatin, Hong Kong