| http://www.w3.org/ns/prov#value | - Differences in the activity of normal vs. tumor-derived fibroblasts may result from variations in establishment of reciprocal communication between epithelial and fibroblast compartments, which in turn could result from differences in molecular and/or cellular mechanisms that are responsible for the production and release of a number of soluble paracrine factors such as FGF(s) (Giri, D. et al., Cl
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