chronic cough phlegm in throatchronic cough with yellow phlegmchronic cough with clear phlegmchronic cough with phlegm for yearschronic cough with white phlegmchronic cough with green phlegmlong lasting cough with phlegmchronic phlegmcauses of persistent cough with phlegmfrequent coughing up phlegmconsistent cough with phlegmlingering cough with phlegm
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