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Primary Insomnia
A sleep disorder characterized by difficulty initiating or maintaining sleep; this difficulty does not occur in the context of another sleep disorder and is not etiologically linked to a mental disorder, substance use, or a general medical condition. (NCI Thesaurus)
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Specifies whether this is the main or principal entity.
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Abnormally low levels of thyroid hormones due to a disorder originating within the thyroid gland.
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A rare disorder of unknown etiology characterized by hypertrophy of the bones of the distal extremities, periostosis of the tubular bones, digital…
