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Level 5 evidence is hypothesis-generating; leaves open whether findings warrant changes in cardiopulmonary rehabilitation practice.
Division of Cardiology, Department of Medicine, Weill Medical College of Cornell University, New York; and the New York Presbyterian Hospital. Address correspondence to: Paul Kligfield, MD, Division of Cardiology, Department of Medicine, Weill Medical College of Cornell University, and the New York-Presbyterian Hospital, 525 East 68th St, New York, NY 10021(e-mail: [email protected]).
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Kaplan et al. (2005) studied this question.
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