Data were extracted from the literature sample on study design and evidence for hypothesized effects of donor proliferation on health program performance, which were iteratively grouped into categories and mapped into a new conceptual framework.
The study identified ten main types of limitation in these practices reported in the literature: sample characteristic limitations, methodological limitations, psychometric limitations, qualitative research limitations, missing data, social desirability bias, item limitations, brevity of the scale, difficulty controlling all variables, and lack of manual instructions.
In order to proceed with a manageable data extraction phase, in terms of time and available resources, whilst keeping the data representative of the literature, a sample of articles was randomly selected (Additional file 1 (AF1)), using the sample function in R 2.12.1.
Furthermore, in most methods found in the literature, large sample volumes (up to 4000 mL) are often used for solid phase extraction prior to analysis to detect estrogens [1, 15, 23, 37, 44 47, 57, 58].
Based on the results of the literature a sample size calculation was performed with the openepi program (http://www.openepi.com).
As there were no recent data in the literature, the sample size was estimated based on the latest national oral-health survey conducted in 2005, when the prevalence of dental caries of 12-year-olds in western China was 25%%.
Contrary to findings in the literature, our sample of female offenders was less likely to attain a higher level of education and were more likely to be unemployed than male offenders.
As shown in the literature, borderline samples are ideal for various posttreatment comparisons [1, 23 25].
A variety of such algorithms have been proposed in the literature for sampling models from the posterior distribution in Bayesian variable selection.
There are several studies in the literature of sampling to be found in the general area of reproducing kernel spaces, and we can ask whether results of the present paper might be given more general forms in that theory.
The mechanical behaviour of the solid dendrites near the liquidus temperature was not available in the literature; therefore, samples were fabricated and compression tested using a Gleeble 3500 thermomechanical simulator.
