[1] Sungshin Univ, Dept Psychol, Seoul, South Korea
[2] Korea Univ, Ansan Hosp, Inst Human Genom Study, Coll Med, Ansan, Gyeonggi, South Korea
[3] Korea Univ, Ansan Hosp, Biomed Res Ctr, Ansan, Gyeonggi, South Korea
[4] Univ Penn, Div Sleep Med, Dept Med, Philadelphia, PA USA
[5] Korea Univ, Coll Med, Seoul, South Korea