[1] Chulalongkorn Univ, Div Nephrol, Dept Med, Fac Med, Bangkok, Thailand
[2] King Chulalongkorn Mem Hosp, Bangkok, Thailand
[3] Vichaiyut Hosp, Dept Med, Nephrol Unit, Bangkok, Thailand
[4] Chulalongkorn Univ, Dept Pathol, Fac Med, Bangkok, Thailand
[5] Bangkok Hosp, Bangkok, Thailand