Research Methods & Reporting
AMSTAR 2: a critical appraisal tool for systematic reviews that include randomised or non-randomised studies of healthcare interventions, or bothBMJ 2017; 358 doi: https://doi.org/10.1136/bmj.j4008 (Published 21 September 2017) Cite this as: BMJ 2017;358:j4008
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.