Optimizing the 6-min walk test as a measure of exercise capacity in COPD.
Chandra D, Wise RA, Kulkarni HS, Benzo RP, Criner G, Make B, Slivka WA, Ries AL, Reilly JJ, Martinez FJ, Sciurba FC. Optimizing the 6-min walk test as a measure of exercise capacity in COPD. Chest. 2012 Dec; 142(6):1545-1552.