[1] Royal Coll Surgeons Ireland, Dept Med, Dublin, Ireland
[2] Univ Sydney, Woolcock Inst Med Res, Clin Management Grp, Sydney, NSW, Australia
[3] Queen Mary Univ London, Blizard Inst, London, England
[4] Johns Hopkins Sch Med, Dept Med, Div Pulm & Crit Care Med, Baltimore, MD USA
[5] Univ Genoa, DIMI Dept Internal Med, Allergy & Resp Dis Clin, IRCCS AOU San Martino IST, Genoa, Italy
[6] Univ Indonesia, Persahabatan Hosp, Dept Pulmonol & Resp Med, Fac Med, Jakarta, Indonesia
[7] Univ Edinburgh, Usher Inst Populat Hlth Sci & Informat, Allergy & Resp Res Grp, Edinburgh, Midlothian, Scotland