[1] Univ New South Wales, Sch Populat Hlth, Sydney, NSW, Australia
[2] Bond Univ, Fac Hlth Sci & Med, Gold Coast, Qld, Australia
[3] NSW Hlth, South Western Sydney Local Hlth Dist, Primary & Integrated Care Unit PaICU, Sydney, NSW, Australia
[4] Univ Technol, Sch Publ Hlth, Biostat, Sydney, NSW, Australia
[5] Asthma Australia, Res & Evaluat, Chatswood, NSW, Australia
[6] Univ Wollongong, Grad Sch Med, Fac Sci Med & Hlth, Wollongong, NSW, Australia
[7] Univ Wollongong, Primary Hlth Care Nursing, Wollongong, NSW, Australia
[8] Illawarra Hlth & Med Res Inst, Wollongong, NSW, Australia
[9] Univ Wollongong, Grad Sch Med, Gen Practice, Wollongong, NSW, Australia