1. Sleep and society: an epidemiological perspective;Bixler;Sleep Med,2009
2. Sleep epidemiology--a rapidly growing field;Ferrie;Int J Epidemiol,2011
3. Percentage of adults who reported an average of < 6 hours of sleep per 24-gour period, by sex and age group --- United States, 1985 and 2004;Centers for Disease Control and Prevention;MMWR Morb Mortal Wkly Rep,2005
4. QuickStats: percentage of adults aged > 18 tears 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
5. Trends in the prevalence of short sleepers in the USA: 1975-2006;Knutson;Sleep,2010