Exercise testing does not have to be complicated

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2. ATS/ACCP Statement on Cardiopulmonary Exercise Testing . American Thoracic Society/American College of Chest Physicians . Am J Respir Crit Care Med 2003; 167: 211-277 .

3. Cooper CB , Sowash J , Taylor M , Storer TW . Officed based cardiopulmonary exercise testing empowers medical decision making . Chest 2003; 124: 164S-164S .

4. O'Donnell DE , Fluge T , Gerken F et al. Effects of tiotropium on lung hyperinflation, dyspnoea and exercise tolerance in COPD Eur Respir J 2004; 23: 832-840 .