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  1. Knee Pain Location Chart: What Knee Pain May Indicate - Healthline

  2. Patellofemoral pain syndrome - Symptoms and causes - Mayo Clinic

  3. Causes and Treatments for Bilateral Knee Pain - Verywell Health

  4. Anterior Knee Pain - Symptoms and Causes - Penn Medicine

  5. Anterior Knee Pain: Symptoms, Causes & Treatment - Cleveland Clinic

  6. Anterior Knee Pain - Physiopedia

  7. Patellofemoral Syndrome - StatPearls - NCBI Bookshelf

  8. Patellofemoral Pain Syndrome - OrthoInfo - AAOS

  9. Patellofemoral Pain Syndrome - AAFP

  10. Anterior knee pain: What it is, causes, and symptoms - Medical News Today