METHODS	Effects of the HCRP are assessed in 15 COPD patients with moderate to severe airflow limitation ( inspiratory vital capacity [ IVC ] : mean , 75.4 [ SD , 13.7 ] percent predicted , mean FEV1 : 45.5 [ 6.9 ] percent predicted ) and are compared with a stratified and randomized control group ( n = 15 ) .\