[1] Univ Malaya, Fac Med, Dept Med, Kuala Lumpur 50603, Malaysia
[2] Chinese Univ Hong Kong, Prince Wales Hosp, Dept Med & Therapeut, Shatin, Hong Kong, Peoples R China
[3] Asia Diabet Fdn, Shatin, Hong Kong, Peoples R China
[4] Chinese Univ Hong Kong, Prince Wales Hosp, Hong Kong Inst Diabet & Obes, Shatin, Hong Kong, Peoples R China
[5] Chinese Univ Hong Kong, Prince Wales Hosp, Li Ka Shing Inst Hlth Sci, Shatin, Hong Kong, Peoples R China
[6] Univ Oxford, Harris Manchester Coll, Oxford Ctr Diabet Endocrinol & Metab, Oxford, England