1. Roth T. Insomnia: definition, prevalence, etiology, and consequences. J Clin Sleep Med. 2007;3(5 Suppl):S7.
2. Ishak WW, Bagot K, Thomas S, Magakian N, Bedwani D, Larson D, et al. Quality of life in patients suffering from insomnia. Innov Clin Neurosci. 2012;9(10):13.
3. Matthews EE, Arnedt JT, McCarthy MS, Cuddihy LJ, Aloia MS. Adherence to cognitive behavioral therapy for insomnia: a systematic review. Sleep Med Rev. 2013;17(6):453–64.
4. American Psychiatric Association. Diagnostic and statistical manual of mental disorders (DSM-5). Arlington, VA: American Psychiatric Publishing; 2013.
5. Almeneessier AS, Alamri BN, Alzahrani FR, Sharif MM, Pandi-Perumal SR, BaHammam AS. Insomnia in primary care settings: still overlooked and undertreated? J Nat Sci Med. 2018;1(2):64–8.