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Effects of anticoagulants on Platelet-derived growth factor-BB (PDGF-BB) concentration in pure-PRP samples. Pure-PRP samples were prepared from whole-blood samples stored for 24 h and stored at −80 °C until ELISA. (a) PDGF-BB concentration and (b) PDGF-BB levels in 107 platelets. n = 15.
