[1] Thammasat Univ, Div Dermatol, Dept Med, Chulabhorn Int Coll Med, Pathum Thani, Thailand
[2] Chulalongkorn Univ, Dept Prevent & Social Med, Fac Med, Bangkok 10330, Thailand
[3] Johns Hopkins Bloomberg Sch Publ Hlth, Dept Int Hlth, Baltimore, MD USA