title: Trial watch: phase II and phase III attrition rates 2011-2012.
authors.forename: John
authors.initials: J
authors.lastname: Arrowsmith
authors.forename: Philip
authors.initials: P
authors.lastname: Miller
mesh_terms: D017322:Clinical Trials, Phase II as Topic / Q000706:statistics & numerical data / Q000639:trends*; D017326:Clinical Trials, Phase III as Topic / Q000706:statistics & numerical data / Q000639:trends*; D057239:Early Termination of Clinical Trials / Q000706:statistics & numerical data*; D006801:Humans; D017211:Treatment Failure