[1] Fujian Med Univ, Fujian Prov Hosp, Shengli Clin Med Coll, Dept Sleep Ctr, Fuzhou, Peoples R China
[2] Chinese Univ Hong Kong, Fac Med, Dept Psychiat, Hong Kong, Peoples R China
[3] Chinese Univ Hong Kong, Fac Med, Dept Psychiat, Li Chiu Kong Family Sleep Assessment Unit, Hong Kong, Peoples R China
[4] Guangzhou Med Univ, Ctr Sleep & Circadian Med, Affiliated Brain Hosp, Guangzhou, Peoples R China
[5] Chinese Univ Hong Kong, Shatin Hosp, Dept Psychiat, Li Chiu Kong Family Sleep Assessment Unit,Shatin, Hong Kong, Peoples R China