Both groups are problematic to identify but could be very important.
However, when considering crime in both place and time, it is problematic to identify crime rates.
Although most causes of death are problematic to identify in this period, smallpox was easy to recognize, and was probably reported fairly accurately.
Although some formulation of the HBM included the construct of cues to action, it is diverse in nature and has been problematic to identify and measure [ 26], especially in explanatory studies [ 28].
However, it is problematic to identify marker genes when the cell type of interest is still poorly characterized because specifically expressed genes can only be unequivocally established once the cells have been isolated.
After the disaster (as after many others) it was problematic to identify exactly who had been directly affected by the disaster, not at least because of the various possible definitions of 'affected', including the concept 'exposed'exposed
If this assumption is violated, it will be problematic to use the IV method to identify the effect of school starting age.
Thus, this case series was large enough to demonstrate that the OLS E2 and WLS E2 models can be problematic for identifying hot spots with only 90 min of data.
To date, the genetic coverage of miRNA genes has been low (3× to 5× coverage) in large-scale resequencing projects, such as the 1000 Genomes, which can be problematic for identifying low-frequency variants with high confidence [ 35].
However spectral demixing requires prior knowledge of spectral components and PCA analysis could be problematic in identifying specific components in systems where there is a continuum of states.
These data were self-reported, and recall bias may be problematic when trying to identify and quantify CAM use.
