[1] Univ Newcastle, Sch Med & Publ Hlth, John Hunter Hosp, Dept Resp & Sleep Med, New Lambton Hts, NSW, Australia
[2] Australasian Severe Asthma Network, Newcastle, NSW, Australia
[3] Frankston Hosp, Dept Thorac Med, Frankston, Vic, Australia
[4] Australasian Severe Asthma Network, Melbourne, Vic, Australia
[5] Univ Newcastle, John Hunter Hosp, Sch Med & Publ Hlth, Dept Resp & Sleep Med, Newcastle, NSW, Australia