title: Reply: To PMID 22445230.
authors.forename: Jihui
authors.initials: J
authors.lastname: Zhang
authors.forename: S P
authors.initials: SP
authors.lastname: Lam
authors.forename: Y K
authors.initials: YK
authors.lastname: Wing
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D012890:Sleep / Q000502:physiology*; D007319:Sleep Initiation and Maintenance Disorders / Q000453:epidemiology* / Q000503:physiopathology*; D014851:Wakefulness / Q000502:physiology*