Analysis of information sources in references of the Wikipedia article "Sleep disorder" in English language version.
...insomnia is a symptom. It is neither a disease nor a specific condition. (from p. 322)
Last Reviewed: September 14, 2022. Source: National Center for Chronic Disease Prevention and Health Promotion, Division of Population Health.
Last Reviewed: September 14, 2022. Source: National Center for Chronic Disease Prevention and Health Promotion, Division of Population Health.