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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Newly formed vessels per mm2 (A) and branching points per mm2 (B) of the CAM after 24 h of incubation of BSMs with (+)/without PRF in comparison to the negative control and PRF alone (* p < 0.05).