1. Division of Pulmonary, Critical Care and Allergy, Department of Internal Medicine, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
2. Division of Pulmonology, Department of Medicine, Hat Yai Medical Education Center Hatyai Hospital, Songkhla, Thailand
3. Division of Pulmonary and Critical Care, Department of Internal Medicine, Maharat Nakhon Ratchasima Hospital, Nakhon Ratchasima, Thailand
4. Medical and Regulatory Affairs Department, AstraZeneca, Bangkok, Thailand
5. Respiratory and Immunology, AstraZeneca, The Hague, Netherlands