8Benton MJ ,Alexander JL.Validation of functional fitness tests as surrogates for strength measurement in frail, older adults with chronic obstructive pulmonary disease [ J ]. American Journal of Physieal Medicine and Rehabilitation, 2009, 7 (12) :7231-7233.
9Sugawara K,Takahashi H,Kashiwagura T,et al. Effect of anti-inflammatory supplementation with whey peptide and exercise therapy in patients with COPD. Respir Med,2012, 106(11):1526-1534.
10Higgins JPT, Green S. Cochrane Handbook for Systematic Reviews of Interventions Version 5.1.0. The Cochrane Collaboration, 2011.