Education And Debate Navigating across medicine's electronic landscape, stopping at places with Pub or Central in their names BMJ 2001; 323 doi: https://doi.org/10.1136/bmj.323.7321.1120 (Published 10 November 2001) Cite this as: BMJ 2001;323:1120 Article Related content Metrics Responses Peer review Related articles Letter Several databases give free access now Published: 30 March 2002; BMJ 324 doi:10.1136/bmj.324.7340.790/a See more Chemoprevention of colorectal cancer in individuals with previous colorectal neoplasia: systematic review and network meta-analysis BMJ December 05, 2016, 355 i6188; DOI: https://doi.org/10.1136/bmj.i6188 Alpha blockers for treatment of ureteric stones: systematic review and meta-analysis BMJ December 01, 2016, 355 i6112; DOI: https://doi.org/10.1136/bmj.i6112 Sex based subgroup differences in randomized controlled trials: empirical evidence from Cochrane meta-analyses BMJ November 24, 2016, 355 i5826; DOI: https://doi.org/10.1136/bmj.i5826 Association between prediabetes and risk of cardiovascular disease and all cause mortality: systematic review and meta-analysis BMJ November 23, 2016, 355 i5953; DOI: https://doi.org/10.1136/bmj.i5953 Effects of ischaemic conditioning on major clinical outcomes in people undergoing invasive procedures: systematic review and meta-analysis BMJ November 07, 2016, 355 i5599; DOI: https://doi.org/10.1136/bmj.i5599 Cited by... Several databases give free access nowFulltext