title: Clinical trial quality needs to be improved to facilitate metaanalyses.
authors.forename: T C
authors.initials: TC
authors.lastname: Chalmers
mesh_terms: D015982:Bias; D002986:Clinical Trials as Topic / Q000592:standards* / Q000706:statistics & numerical data; D003627:Data Interpretation, Statistical; D006801:Humans; D015201:Meta-Analysis as Topic; D009862:Online Systems; D011643:Publishing; D012107:Research Design