[1] London Sch Hyg & Trop Med, Noncommunicable Dis Epidemiol, Keppel St, London WC1E 7HT, England
[2] Kings Coll London, Div Long Term Condit, James Clerk Maxwell Bldg,57 Waterloo Rd, London SE1 8WA, England
[3] Chiang Mai Univ, Fac Med, Dept Family Med, 110 Intavaroros, Muang Dist 50200, Chiang Mai, Thailand
[4] Chiang Mai Univ, Global Hlth & Chron Condit Res Grp, 239 Huay Kaew Rd, Muang Dist 50200, Chiang Mai, Thailand
[5] UCL, Fac Populat Hlth Sci, 1-19 Torrington Pl, London, England
[6] Walailak Univ, Sch Med, 222 Thaiburi, Nakhon Si 80160, Thammarat, Thailand