Tables for Letter by Cahalin et al

This supplement contains two tables associated with the letter to the editor by Cahalin et al, which discussed the article by Dechman and Wilson, "Evidence Underlying Breathing Retraining in People With Chronic Obstructive Pulmonary Disease" (December 2004).

Files in this Data Supplement:

• Table 1. Important Issues in Diaphragmatic Breathing - A summary of important issues in diaphragmatic breathing (DB).
• Table 2: Major Strengths and Weaknesses of Studies on Diaphragmatic Breathing in People With Chronic Obstructive Pulmonary Disease (COPD) - A summary of major strengths and weaknesses of studies on DB in people with chronic obstructive pulmonary disease (COPD).