1. Epidemiology of insomnia: what we know and what we still need to learn;Sleep Med Rev,2002
2. Professional correlates of insomnia;Sleep,2006
3. Clinical and socioeconomic correlates of insomnia;J Clin Psychiatry,2004
4. Chronic insomnia as a risk factor for developing anxiety and depression;Sleep,2007
5. National Institutes of Health State of the Science Conference Statement on manifestations and management of chronic insomnia in adults, June 13–15, 2005;National Institutes of Health;Sleep,2005