Letters Registers for clinical trials already exist BMJ 1995; 310 doi: https://doi.org/10.1136/bmj.310.6994.1604 (Published 17 June 1995) Cite this as: BMJ 1995;310:1604 Article Related content Metrics Responses Peer review Related articles Editorial Misleading meta-analysis Published: 25 March 1995; BMJ 310 doi:10.1136/bmj.310.6982.752 See more Trump chooses Obamacare opponent to lead Health and Human Services BMJ November 30, 2016, 355 i6469; DOI: https://doi.org/10.1136/bmj.i6469 Drug firms need to tackle affordability BMJ November 14, 2016, 355 i6096; DOI: https://doi.org/10.1136/bmj.i6096 World Medical Association’s tainted president, Ketan Desai BMJ November 10, 2016, 355 i5867; DOI: https://doi.org/10.1136/bmj.i5867 Cancer drugs, survival, and ethics BMJ November 09, 2016, 355 i5792; DOI: https://doi.org/10.1136/bmj.i5792 WHO refers $29m Oxford research project to GMC for misconduct BMJ November 07, 2016, 355 i5971; DOI: https://doi.org/10.1136/bmj.i5971 Cited by... Misleading meta-analysisFulltext