Sputum Color
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Sputum: Contents, Function, Conditions, Colors Coughing Up Phlegm: Causes and Treatment What Is Mucus? | UPMC HealthBeat Sputum Color
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Sputum: Contents, Function, Conditions, Colors Coughing Up Phlegm: Causes and Treatment What Is Mucus? | UPMC HealthBeat Sputum Color