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in treating cervical lymph node tuberculosis with parapharyngeal space abscess.ObjectiveTo investigate the key factors related to the severity of chronic subjective tinnitus through a complex network analysis. MethodsA retrospective study about patients with chronic subjective tinnitus presented to Peking Union Medical College Hospital from December 2019 to October 2020 was conducted. The demographic information, audiometric and tinnitus-related tests, and scores of Tinnitus Handicap Inventory(THI), Hospital Anxiety and Depression Scale