Although it is unlikely that differences in these variables between RA patients and controls are of sufficient size to yield biased results, patients and controls were matched on age and gender and randomly selected to prevent selection bias.
To prevent selection bias and increase confidence in our ability to generalise results we randomly selected studies and randomly allocated them to each reviewer.
Additionally, to prevent selection of genes that were essential in non-transformed cells we required that selected shRNAs were not significantly depleted (p <0.05 and log2FC <-1) in the two non-transformed lines.
Banning present and former MPs from candidacy would equally prevent selection being used as a weapon of Commons discipline.
The main advantage of an RCT is that the randomization procedure helps to prevent selection bias by the clinician by breaking the link between the clinician's therapy prescription and the patient's prognosis.
It has been reported that prolonged use of IV colistin predisposes to VAP caused by pandrug-resistant bacteria, probably related to colistin poor lung tissue penetration and low concentrations at the infection site [39, 40], whereas nebulised colistin with a higher tissue concentrations in infected lung regions prevent selection of resistant strains [11].
This was done to prevent selection of binders that bind only to denatured VEGF-C.
To prevent selection of GST-binding peptides, the peptide-phage solution was supplemented with 30 µg/ml recombinant GST.
To prevent selection bias in favour of slow progressors, cases were included only if their first biomarker value was recorded after 1996.
For a vaccine to be effective to control highly variable RNA viruses, it must evoke a broad immune response targeted to many independent T-cell and B-cell epitopes, in order to prevent selection of vaccine-escape mutants.
Artemisinin derivatives reduce gametocyte production [54] but their a very short half life is unlikely to prevent selection of re-infecting CQ-resistant parasites during the post-treatment period.
