title: PER2 variation is associated with diurnal preference in a Korean young population.
authors.affiliation: Department of Psychiatry, Korea University College of Medicine, 126-1 5-Ka, Anam-Dong, Sungbuk-Ku, Seoul, Korea.
authors.forename: Heon-Jeong
authors.initials: HJ
authors.lastname: Lee
authors.forename: Leen
authors.initials: L
authors.lastname: Kim
authors.forename: Seung-Gul
authors.initials: SG
authors.lastname: Kang
authors.forename: Ho-Kyoung
authors.initials: HK
authors.lastname: Yoon
authors.forename: Jung-Eun
authors.initials: JE
authors.lastname: Choi
authors.forename: Young-Min
authors.initials: YM
authors.lastname: Park
authors.forename: Seog Ju
authors.initials: SJ
authors.lastname: Kim
authors.forename: Daniel F
authors.initials: DF
authors.lastname: Kripke