[1] Univ Santo Tomas Hosp, Sect Allergy Asthma & Immunol, Manila, Philippines
[2] Victor R Potenciano Med Ctr, Dept Pediat, Mandaluyong, Philippines
[3] St Lukes Med Ctr, Dept Otolaryngol Head & Neck Surg, Quezon City, Philippines
[4] Univ Philippines Manila, Philippine Gen Hosp, Div Allergy & Immunol, Manila, Philippines
[5] Med City Ortigas, Sect Pulm Med, Pasig, Philippines
[6] Philippine Childrens Med Ctr, Sect Pediat Endocrinol, Quezon City, Philippines
[7] Fe Mundo Med Ctr, Allergy Immunol Sect, Quezon City, Philippines
[8] Vet Mem Med Ctr, Sect Pulm Med, Quezon City, Philippines
[9] San Beda Univ, Program Internal Med, Coll Med, Manila, Philippines
[10] Hop Arnaud Villeneuve, Univ Hosp, Dept Resp Dis, Montpellier, France
[11] INSERM, U1018, CESP Ctr Res Epidemiol & Populat Hlth, Resp & Environm Epidemiol Team, Villejuif, France
[12] Univ Santo Tomas Hosp, Sect Allergy Asthma & Immunol, Espana Blvd, Sampaloc 1015, Manila, Philippines