| http://www.w3.org/ns/prov#value | - ifferent methodologies.15-27 Those studies tended to indicate a benefit from taking tumor vascularization into account and reported an increase in the RR despite great variations in methodology.28, 29 However, reproducibility is an issue when these techniques require the definition of a region of interest, which can be more prone to bias than the measure of a single tumor dimension.
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