As it has been noted that the central inferomedial region of the acetabulum is not covered by cartilage, as in prior studies using MRI [ 13] and arthroscopy [ 17], it is not possible to score cartilage there.
These techniques have been validated in prior studies using measurements obtained directly by flow probe [29].
However, relative stability in intake across trimesters has also been observed, 48 49 and similar or even later time points of dietary assessment have been used by prior studies on GWG. 7 8 21 We used self-reported dietary and outcome data.
Corrected CFT, on the other hand, when measured using only a single waveform, as per the method used by prior studies [22, 25 27], demonstrated no correlation with CO.
In this study, risk behaviors were dichotomized on the basis of definitions used by prior studies [ 4, 22, 23].
We note that some investigators intentionally drew on the materials used by prior studies, establishing areas of commonality [ 1, 12, 60].
For comparison, the expression stability and abundance of 50 genes previously used or proposed by prior studies as reference genes [ 6, 10, 14] were also screened for abundance and stability across all probes for identification of candidate reference genes.
In addition, analysis of 50 genes previously used or proposed by prior studies as reference genes [ 6, 10, 14] identified an additional three genes with small variance across probes: RPL13A, EEF1A1 and RNPS1 (Table 2, see Additional file 1 for Affymetrix probe intensities for all 50 genes).
Our results match the findings reported by prior studies [ 16].
While our sample size was limited by the database, prior studies which used this database reached significance (thus, independent power calculations were not performed).
