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The study design and rationale of the randomized controlled trial: translating COPD guidelines into primary care practice

Donna R Parker*, Charles B Eaton, David K Ahern, Mary B Roberts, Caitlin Rafferty, Roberta E Goldman, F Dennis McCool and Joseph Wroblewski

BMC Family Practice 2013, 14:56  doi:10.1186/1471-2296-14-56