1. Perceived insufficient rest or sleep among adults-United States, 2008;Centers for Disease Control and Prevention;MMWR Morb Mortal Wkly Rep,2009
2. Percentage of adults who reported an average of <6 hours of sleep per 24-hour period, by sex and age group-United States, 1985 and 2004;Centers for Disease Control and Prevention;MMWR Morb Mortal Wkly Rep,2005
3. American time use survey: Sleep time and its relationship to waking activities;Basner;Sleep,2007
4. Trends in self-reported sleep duration and insomnia-related symptoms in Finland from 1972 to 2005: A comparative review and re-analysis of Finnish population samples;Kronholm;J Sleep Res,2008
5. QuickStats: Percentage of adults aged >18 years who reported an average of <6 hours of sleep per 24-hour period, by sex and age group-National Health Interview Survey, United States, 1985 and 2006;Centers for Disease Control and Prevention;MMWR Morb Mortal Wkly Rep,2008