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  1. Chronic sinusitis - Symptoms and causes - Mayo Clinic

  2. Acute sinusitis - Symptoms and causes - Mayo Clinic

  3. Acute sinusitis - Diagnosis and treatment - Mayo Clinic

  4. Sinus Infection (Sinusitis): Causes, Symptoms & Treatment

  5. Sinusitis | Johns Hopkins Medicine

  6. Sinus Infection (Sinusitis): Symptoms, Causes, Duration, and ... - WebMD

  7. Sinus Infection (Sinusitis or Rhinosinusitis) - Yale Medicine

  8. Sinusitis - Ear, Nose, and Throat Disorders - MSD Manuals

  9. What to do about sinusitis - Harvard Health

  10. Acute Sinusitis: Causes, Symptoms & Diagnosis - Healthline