RT Journal Article SR Electronic T1 Up to 4000 mg of paracetamol a day is ineffective for acute low back pain JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 100 OP 100 DO 10.1136/ebmed-2014-110157 VO 20 IS 3 A1 Andrew Moore YR 2015 UL http://ebm.bmj.com/content/20/3/100.abstract AB