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Treatment of COPD by stage. Reproduced from Lipson DA. 2004. Redefining treatment in COPD: new directions in bronchodilator therapy. Treat Respir Med, 3:89–95. Erratum in Treat Respir Med, 3:181. Copyright © 2004, with permission from Adis International Ltd.
Abbreviations: LVRS, lung volume reduction surgery.
