From: Section 3, Component 3: Control of Environmental Factors and Comorbid Conditions that affect asthma
Expert Panel Report 3: Guidelines for the Diagnosis and Management of
Asthma.
National Asthma Education and Prevention Program, Third Expert Panel on the
Diagnosis and Management of Asthma.
Bethesda (MD): National Heart, Lung, and Blood Institute (US); 2007 Aug.
NCBI Bookshelf. A service of the National Library of Medicine, National Institutes of Health.