Screening for Chronic Obstructive Pulmonary Disease Using Spirometry: Summary of the Evidence for the U.S. Preventive Services Task Force

Appendix Figure 1.
Appendix Figure 1. Study flow diagram: key question 3.

COPD = chronic obstructive pulmonary disease.

This Article

  1. Ann Intern Med April 1, 2008 vol. 148 no. 7 535-543