We used the bibliography listed on the cover page of each trial summary to retrieve the earliest journal article reporting on the full trial.
We searched PubMed, EMBASE and Cochrane Central Register of Controlled Trials through February 2014 to retrieve randomized controlled trials of HFOV in adult ARDS patients.
We have determined how often automated search methods, using indexing terms and/or textwords in the title or abstract, would fail to retrieve trials with adverse effects data.
An experienced medical librarian designed terms (see table 1) to retrieve trials enrolling participants with prehypertension or hypertension managed with multiple lifestyle modifications.
We therefore set out to determine the number of instances in which automated searches of the EMBASE and MEDLINE databases would fail to retrieve trials that we already knew contained adverse effects data.
Seumas Milne, writing in the Guardian last week, believes that putting Saddam on trial is an attempt to retrieve "retrospective justification for last year's unprovoked invasion" and then argues that because of the torture of prisoners by US and British soldiers all moral authority has been drained from the coalition.
Thus, prior to experimental trials, three subjects were allowed to retrieve tools from tubes with their beaks and use these tools to retrieve food ('experienced' subjects: 'Betty'Pierrerre', and 'Uék'), whereas three were exposed to empty tool-tubes and a freely-available tool that could be used for food retrieval ('inexperienced' subjects: 'Barry, Kennyny', and 'Nalik'Nalik
Electronic databases, including PubMed, EMBASE, the Cochrane library and the Science Citation Index, were searched to retrieve relevant trials.
Also, our search strategy relied on PubMed's publication type to retrieve randomised trials and systematic reviews and therefore may have missed some eligible papers and included some that are not truly systematic reviews or randomised trials.
Thirdly, some of the examined networks had already excluded specific trials and treatments upfront, and it was not practical for us to try to retrieve the excluded trials and evaluate the impact of their inclusion.
