deletions | additions       diff --git a/We_are_assuming_that_the__.tex b/We_are_assuming_that_the__.tex  index ea4fd82..97ce850 100644  --- a/We_are_assuming_that_the__.tex  +++ b/We_are_assuming_that_the__.tex 
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We are assuming that the consistency of positioning varies between sites, because we did not define a standardized positioning protocol. A big reason for this is because we want to be able to incorporate data that was already acquired for future studies. In the scaling factor derivation, we take the average of the two volumes to calibrate, and calculate an "overall" bias, but we cannot say much about the bias due just to positioning. However, we do have a some  measure of positioning consistency that is calculated via the amount of variability due to "run" in our ICC calculation. calculation - variability in positioning will certainly contribute to the variability between runs.  This variance component is much smaller than the variance due to subjects/sites/subjects x site/undexplained, site/unexplained,  so we will \textbf{report this in a supplemental table}