... 53:267-268.5. Ando K, Kripke DF, Ancoli-Israel S: Delayed and advanced sleep phase symptoms. Isr J Psychiatry Relat Sci 2002, 39:11-18.6. Wolfson AR, Carskadon MA: Sleep schedules and daytime func-tioning ... for DNA and completed extensive questionnairesabout sleep habits, sleep history, family history, sleep quality, morningness-eveningness traits,depression, mania, and seasonality of symptoms. ... bedtime, and age correctly classified all DSPD and DSPD-C. Sleep symptomsBased on sleep and health questionnaires, in one-waycontrasts, DSPD-C tended to report their sleep as "moder-ately"...