The outcome measure of interest, HIV prevalence, may have occurred at any time in the past, whereas the assessment of individual level risk and protective behaviours, network attributes and heroin market features were ascertained for the recent past only.
Despite the fact that TAL1 occupancy and other epigenetic features were ascertained in erythroid cells, the TAL1-bound enhancers that were positive in transgenic mouse embryos were active in brain, heart, and other tissues.
Since the full data are available, we devise a scheme to match these features in the full data with the same features in the ascertained data.
While these bioinformatic approaches have proven effective in identifying sRNAs in several species, they present significant computational challenges, requiring the positional relationships of thousands of individual genetic features to be ascertained for each genome-wide search.
Therefore, the bias caused by the classification scheme could be largely ameliorated and the diagnostic potential of the features could be ascertained through extensive experiments.
This included setting pentamer pairs aside that were used only for feature selection, ascertaining minimal sequence similarity between cross-validation sets, and avoiding to over-sample the data set.
Here we present a retrospective analysis of clinical, neuropsychological and neuroimaging (volumetric and voxel-based morphometric) features in a pathologically ascertained cohort of 95 cases of frontotemporal lobar degeneration classified according to contemporary neuropathological criteria.
Significant parts of scientific investigation are carried out on models rather than on reality itself because by studying a model we can discover features of and ascertain facts about the system the model stands for; in brief, models allow for surrogative reasoning (Swoyer 1991).
The morphological features of these tumours were ascertained by hematoxylin and eosin (H&E) staining.
The clinical features of affected infants were ascertained comprehensively by physician and family interviews and review of the medical record.
