00591nas a2200217   4500000000100000008004100001100001400042700001100056700001500067700001300082700001400095700001400109700000900123700001400132700001500146700001400161700001300175245016600188300001200354490000700366       2018                            d1 aJenkins C1 aHill K1 aMcKeough Z1 aAlison J1 aSpencer L1 aWootton S1 aNg C1 aJenkins S1 aEastwood P1 aHillman D1 aCecins N00aEffect on health-related quality of life of ongoing feedback during a 12-month maintenance walking programme in patients with COPD: a randomized controlled trial  a60 - 670 v23