%0 Journal Article %B Trials %D 2013 %G eng %M 23937999 %P 248 %T PACE--the first placebo controlled trial of paracetamol for acute low back pain: statistical analysis plan %V 14 %2 3750911 %7 2013/08/14 %@ 1745-6215 (Electronic) - 1745-6215 (Linking)