%0 Journal Article
%B European Spine Journal
%D 2012
%G eng
%M 22037844
%P 375-81
%T Trends over time in the size and quality of randomised controlled trials of interventions for chronic low-back pain
%V 21
%7 2011/11/01
%@ 1432-0932 (Electronic)0940-6719 (Linking)