2.9. Analysis.
Comparison 2 Ipratropium bromide + short acting beta‐2 agonist v. short‐acting beta‐2 agonist via nebuliser or MDI, Outcome 9 Test day HRQL‐Chronic Respiratory Disease Questionnaire.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.