Some foreign fighters are difficult to identify with certainty, the officers said, because they tried to conceal their identities with forged documents and aliases.
Clearly, however, more research is needed to identify, with certainty, the factors that drive successful school-based HIV/AIDS risk reduction programmes in Africa.
The four mitochondrial lineages common among Ashkenazis are now very rare elsewhere in the Near East and Europe, making it hard to identify with certainty the lineages from which they originated.
Given the lack of reliable data, no-one could ever identify with certainty the longest recession in history, but there have been some notable examples.
Therefore, even among studies using advanced telemedicine interventions, our review cannot identify with certainty the components essential to success.
In particular, our study did not allow identifying with certainty the potential reasons underlying gender differences in medication.
In clinical practice it is not easy to identify with certainty the actual visual acuity at a distance of work and the transparency of the dioptric media that can compromise the signal-to-noise ratio.
Since there are currently no validated computational molecular models able to fully describe the effects of salt on protein protein interactions it can be difficult to identify with certainty the physical origin of these trends.
Because read depth analysis cannot identify with certainty the type of rearrangement that underlies the CNV, characterization of the type of medium- and large-scale structural genomic variations would require longer reads, larger inserts between paired-end reads, and longer scaffolds than those used in this study.
And while no one has been identified with certainty as the source of the calls, citizen investigators have pieced together enough scraps of information to draw the outline of a money-making racket by home-improvement scamsters.
