[1] Guangzhou Med Univ, Affiliated Hosp 1, State Key Lab Resp Dis, Guangzhou, Peoples R China
[2] Guangzhou Med Univ, State Key Lab Resp Dis, Affiliated Hosp 1, Guanghou, Peoples R China
[3] Righam & Womens Hosp, Div Sleep & Circadian Disorders, Boston, MA USA
[4] Harvard Med Sch, Boston, MA USA
[5] Flinders Univ S Australia, Adelaide Inst Sleep Hlth, Bedford Pk, Australia
[6] Flinders Univ S Australia, Adelaide Inst Sleep Hlth, Daw Pk, Australia
[7] Royal Brompton Hosp, Resp Med, London, England