[1] Univ Penn, Dept Psychiat, Behav Sleep Med Program, Philadelphia, PA 19104 USA
[2] Philadelphia Coll Osteopath Med, Dept Psychol, Philadelphia, PA USA
[3] Univ Penn, Dept Biostat & Epidemiol, Philadelphia, PA 19104 USA
[4] Univ Penn, Ctr Sleep & Circadian Neurobiol, Perelman Sch Med, Philadelphia, PA 19104 USA
[5] Univ Arizona, Coll Med, Sleep & Hlth Res Program, Tucson, AZ USA
[6] Northumbria Univ, Northumbria Ctr Sleep Res, Newcastle Upon Tyne, Tyne & Wear, England