Education And Debate
Methods in health services research
Interpreting the evidence: choosing between randomised and non-randomised studies
BMJ 1999; 319 doi: https://doi.org/10.1136/bmj.319.7205.312 (Published 31 July 1999) Cite this as: BMJ 1999;319:312
Article usage
Article metrics provide readers and authors with an indication of how often a specific article has been accessed month by month. It counts three formats - abstract/extract, full text and pdf. The page is updated each day.