[1] Ludwig Maximilian Univ Munich, Inst Med Psychol, Munich, Germany
[2] Univ Basel, Ctr Chronobiol, Psychiat Clin, Basel, Switzerland
[3] Univ Surrey, Fac Hlth & Med Sci, Chronobiol, Guildford, Surrey, England
[4] Univ Calif San Diego, Dept Psychiat, La Jolla, CA 92093 USA
[5] Univ Calif San Diego, Ctr Circadian Biol, La Jolla, CA 92093 USA
[6] Univ Colorado Boulder, Dept Integrat Physiol, Boulder, CO USA
[7] Univ Surrey, Fac Hlth & Med Sci, Sch Biosci & Med, Surrey Sleep Res Ctr, Guildford, Surrey, England
[8] Northwestern Univ, Dept Neurol, Chicago, IL 60611 USA
[9] Univ Calif San Diego, Dept Psychol, La Jolla, CA 92093 USA
[10] Univ Calif San Diego, Ctr Circadian Biol, La Jolla, CA 92093 USA
[11] Harvard Univ, Brigham & Womens Hosp, Div Sleep & Circadian Disorders, Boston, MA 02115 USA