[1] Univ Hong Kong, Sleep Res Clin & Lab, Dept Psychol, Hong Kong, Peoples R China
[2] Chinese Univ Hong Kong, Dept Psychiat, Fac Med, Li Chiu Kong Family Sleep Assessment Unit, Hong Kong, Peoples R China
[3] Chinese Univ Hong Kong, Hong Kong, Peoples R China
[4] Guangzhou Med Univ, Ctr Sleep & Circadian Med, Affiliated Brain Hosp, Guangzhou, Guangdong, Peoples R China
[5] Chinese Univ Hong Kong, Dept Paediat, Fac Med, Hong Kong, Peoples R China
[6] Univ Oxford, Oxford, England