Those comments by Mr. Bush have generated considerable debate over the validity of comparisons to Vietnam and the right of a president who eluded Vietnam service to make them.
The response rate also was much higher for nurses than for physicians, which limits the validity of comparisons between these two groups.
These mix-ups, likely due to accidental mislabeling of the data at some point, but possibly also from cell contamination in the original samples, could have untold effects on the validity of comparisons in genomics experiments conducted worldwide, according to the group, which last week posted its findings on bioRxiv, a site for preprints that have not yet been formally peer reviewed.
A growing body of methodological research sheds light on the validity and reliability of social network survey data regarding a single relation, but much less attention has been paid to the measurement of multiplex networks and the validity of comparisons among criterion relations.
Taken as a whole, these results affirm the cell-type specificity and reproducibility of single cell expression profiling, and the validity of comparisons between ages.
These limitations may harm the validity of comparisons among schools.
It, however, does not influence on validity of comparisons between sites or patients.
All the enzymatic hydrolysis assays were conducted under the same conditions to ensure the validity of comparisons.
There was wide heterogeneity in the operationalisation of health service utilisation (HSU) by included studies, which limits the validity of comparisons across studies.
Hence, the data from which dietary intakes of sugar subtypes are calculated are not very robust, affecting the validity of comparisons between studies.
