Insomnia is one of the most common sleep complaints with a prevalence of 3--22 % depending on the classification system.
CITATION STYLE
Wilson, A., & Attarian, H. P. (2017). Defining Insomnia. In Clinical Handbook of Insomnia (pp. 3–11). Springer International Publishing. https://doi.org/10.1007/978-3-319-41400-3_1
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