Inter-investigators variation was <5%.
Since only our most experienced echocardiologist performed all echoes and measurements, we can assume that the quality of the measurements is very high and an inter-investigator variation can be excluded.
This minimizes inter-investigator variations.
To reduce inter-investigator variations and improve reproducibility, as well as the spatial accuracy, the latter has been assisted by stereotactical systems [ 14, 15] and frameless image-guidance navigation systems for positioning of TMS coils [ 16].
Other investigators reported variation in mRNA level between HUVEC harvested in their laboratory and HUVEC purchased from American Type Collection [ 38]; in fact ATCC proposes both HUVEC (CRL-1730) and primary umbilical vein endothelial cells, which have different characteristics.
Investigators of variation in decision-making have recommended moving away from examining the demographic characteristics of health professionals and turning instead to exploring psychological and sociological factors [ 2], in particular health professional risk-taking in the face of uncertainty [ 7].
The phone number proved to be a dead end -- there was no area code and when investigators called variations of the number, they were unable to find anyone with "any connection" to the note, Jones said.
The analysis of wet fins was carried out by many investigators with the variation of a linear relationship between specific humidity and the corresponding saturation temperature of air adjacent to the fin surface.
Random samples independently segmented and measured by two investigators showed <5% variation in measured glial area (n=10).
Previous investigators have used variation in both mitochondrial DNA and microsatellites to characterize population sub-structure and ancestral geographic origin [ 5, 7, 21- 23].
Approximately 40% of the responses in each trial were from site principal investigators with some variation across studies in other responder role types (table 1).
