[1] Mahidol Univ, Siriraj Hosp, Fac Med, Dept Med,Div Hypertens, Bangkok, Thailand
[2] Chulalongkorn Univ, King Chulalongkorn Mem Hosp, Fac Med, Dept Med,Div Cardiovasc Med, Bangkok, Thailand
[3] Chiang Mai Univ, Fac Med, Dept Internal Med, Div Nephrol, Chiang Mai, Thailand
[4] Thai Hypertens Soc, 10th Floor,Royal Golden Jubilee Bldg, Bangkok 10310, Thailand