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  1. Green, Yellow, and Brown Phlegm: What Does it Mean? - Healthline

  2. Phlegm Color Chart: What the Color of Your Phlegm Means - Healthgrades

  3. Green Phlegm: Causes, Treatment, and When to See a Doctor - Healthgrades

  4. Coughing Up Green or Yellow Phlegm | Why Your Mucus Changes Color

  5. Decoding Mucus Colors: Yellow, Green, Brown, and More

  6. Phlegm Cheat Sheet: Recognizing Normal and Concerning Colors

  7. Mucus Color: What Does it Mean? - Cleveland Clinic Health …

  8. What does the color of phlegm mean? - Ohio State Health

  9. What Does Green Phlegm or Mucus Mean? Everything to Know

  10. Color of Phlegm: What could it mean? - Medical News Today

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