1. Department of Allergy and Clinical ImmunologyAjou University Medical Center Suwon Korea
2. Department of Biomedical InformaticsAjou University School of Medicine Suwon Korea
3. Department of BiostatisticsAjou University Medical Center Suwon Korea
4. Department of Pulmonary, Allergy and Critical Care Medicine, Kangdong Sacred Heart HospitalHallym University College of Medicine Seoul Korea
5. Observational and Pragmatic Research Institute Singapore
6. Department of Clinical Pharmacy and Pharmacology, Groningen Research Institute for Asthma and COPD (GRIAC), University Medical Centre GroningenUniversity of Groningen Groningen The Netherlands
7. Centre of Academic Primary Care, Division of Applied Health SciencesUniversity of Aberdeen Aberdeen UK