[1] Sunshine Coast Univ Hosp, Dept Resp Med, Birtinya, Australia
[2] Griffith Univ, Sch Med, Brisbane, Qld, Australia
[3] Prince Charles Hosp, Sleep Disorders Ctr, Chermside, Australia
[4] Univ Queensland, Sch Med, Brisbane, Qld, Australia
[5] QIMR Berghofer Med Res, Brisbane, Qld, Australia