[1] Mahidol Univ, Ramathibodi Hosp, Div Pulm & Crit Care Med, Bangkok, Thailand
[2] Phramongkutklao Coll Med, Dept Med, Allergy & Clin Immunol, Bangkok, Thailand
[3] Thammasat Univ, Fac Med, Dept Internal Med, Div Pulm & Crit Care Med, Pathum Thani, Thailand
[4] Phramongkutklao Hosp, Dept Pulm & Crit Care Med, Bangkok, Thailand
[5] Chulalongkorn Univ, Dept Med, Div Pulm & Crit Care Med, Thai Red Cross Soc, Bangkok, Thailand
[6] King Chulalongkorn Mem Hosp, Bangkok, Thailand
[7] Mahidol Univ, Ramathibodi Hosp, Fac Med, Dept Pediat,Div Pediat Pulmonol, Bangkok, Thailand
[8] Thammasat Univ, Fac Med, Dept Emergency Med, Pathum Thani, Thailand
[9] Mahidol Univ, Ramathibodi Hosp, Fac Med, Dept Med,Allergy Immunol & Rheumatol Div, Bangkok, Thailand
[10] Chulalongkorn Univ, Fac Med, Dept Med, Div Pulm & Crit Care Med, Bangkok, Thailand
[11] Thai Red Cross Soc, Excellence Ctr Sleep Disorders, King Chulalongkorn Mem Hosp, Bangkok, Thailand
[12] Srinakharinwirot Univ, Div Pulm & Crit Care, Dept Med, Bangkok, Thailand
[13] Mahidol Univ, Fac Med, Siriraj Hosp, Dept Med,Div Allergy & Clin Immunol, Bangkok, Thailand
[14] Chulalongkorn Univ, King Chulalongkorn Mem Hosp, Fac Med, Dept Med,Div Allergy & Clin Immunol,Thai Red Cros, Bangkok, Thailand
[15] Navamindradhiraj Univ, Fac Med, Dept Med, Div Pulm Med & Pulm Crit Care,Vajira Hosp, Bangkok, Thailand
[16] Thammasat Univ Hosp, Dept Pediat, Ctr Excellence Allergy Asthma & Pulm Dis, Pathum Thani, Thailand