Sentence examples for were usually ascertained from inspiring English sources

Cases were usually ascertained from regional paediatric oncology units.

Family data utilized in genetic association studies of rare diseases are usually ascertained by initially recruiting individuals with the phenotype of interest from some background population.

As the data on hysterectomy collected in most studies are usually ascertained through self-reporting, we feel that the data presented here can inform epidemiologists about the reliability of self-reporting of this variable.

Population genetic structure of this vector has since been usually ascertained with up to 12 microsatellite loci [ 13], that were sometimes supplemented with a few single nucleotide polymorphism (SNP) markers [ 14] or Exon-Primed Intron Crossing (EPIC) markers [ 15- 17].

In natural disasters or terrorist attacks resulting in traumatic injuries, a roughly accurate number of surviving casualties requiring medical care is usually quickly ascertained (within hours).

First, the study design was a retrospective cross-sectional analysis, for which it is usually difficult to ascertain the temporal sequence of exposure and outcome.

The method is directly applicable not only to fecal samples but also to other types of clinical samples; it could detect and identify bacterial pathogens that are usually difficult to ascertain with conventional examination procedures.

It is usually difficult to ascertain the benefit of a marker from a single published study, which may be overoptimistic owing to small sample size and selective reporting, and a clear view is only likely to emerge from looking across multiple studies.

Confounding is usual because prescribers in a particular clinical circumstance may choose to use one drug rather than another, and those circumstances are usually not obvious to, nor ascertained by, the researcher.

Penetrance is usually estimated by examining individuals ascertained as having the disorder in question.

Although in-hospital per cent mortality risks can be ascertained, inpatient deaths are usually at such low rates that it may be difficult to achieve adequate statistical significance.