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Physician and patient perceptions in COPD: the COPD Resource Network Needs Assessment Survey.

Barr RG, Celli BR, Martinez FJ, Ries AL, Rennard SI, Reilly JJ, Sciurba FC, Thomashow BM, Wise RA. Physician and patient perceptions in COPD: the COPD Resource Network Needs Assessment Survey. Am J Med. 2005 Dec; 118(12):1415.

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