However, studies examining these associations have been subject to methodological limitations, including cross-sectional designs, retrospective measures, a lack of stress biomarkers, and the tendency to overlook momentary etiologic processes occurring within each day.
These studies are subject to methodological considerations for both the microarray and QTL analyses.
This analysis was subject to methodological issues that may have biased the interpretation of the results.
However, measurement of both circulating and tissue steroid levels are subject to methodological considerations.
While the authors of all studies reported that physical activity interventions were cost-effective, Dalziel suggested they were subject to methodological limitations.
Measurements of both circulating and tissue steroid levels are subject to methodological considerations that may affect the ability to detect high local steroid levels.
Finally, meta-analyses constitute retrospective research and, thus, are subject to methodological limitations.
Observational studies are subject to methodological biases, with case control studies being prone to biases from participant selection and measurement of exposure.
A limitation of our study was the use of a before-and-after design which may be subject to methodological limitations.
Although studies are subject to methodological difficulties/deficiencies, associations of chronic maxillary sinusitis (CRS) and polymorphisms in more than 30 genes have been published [ 2].
