International Journal of COPD · 2014 · 33 citations · 38 references
In a large population of severely impaired COPD patients with high exacerbation rates, a significant reduction in exacerbation and hospitalization frequency was observed after participation in a comprehensive PRP.
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Martin R. Miller, J. Hankinson, Vito Brusasco et al. · European Respiratory Journal · 2005 · 15.4K citations · Full text
The St George's Respiratory Questionnaire
Paul Jones, Frances Quirk, Chloë M. Baveystock · Respiratory Medicine · 1991 · 2.7K citations