News US Congress introduces bill to end free access to federally funded research BMJ 2009; 338 doi: https://doi.org/10.1136/bmj.b2199 (Published 01 June 2009) Cite this as: BMJ 2009;338:b2199 Article Related content Metrics Responses Peer review Related articles News US passes bill granting mandatory access to data Published: 01 November 2007; BMJ 335 doi:10.1136/bmj.39384.638241.DB 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