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phlegm

A more than normal amount of thick mucus made by the cells lining the upper airways and lungs. A buildup of phlegm may be caused by infection… 
National Institutes of Health

Papers overview

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Review
2005
Review
2005
A variety of pulmonary and ear, nose, and throat (ENT) symptoms and disorders are considered to be extraoesophageal… 
2002
2002
STUDY OBJECTIVES The health-related quality of life of smokers without COPD and that of ex-smokers has not been defined. If… 
Highly Cited
1991
Highly Cited
1991
Grain dust exposure has been associated with both acute and chronic respiratory abnormalities. We sought to answer two questions… 
Review
1985
Review
1985
In early 1976, a survey of persistent cough and phlegm (PCP) prevalence was conducted in 5,623 young adults in 4 Utah communities…