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Viability and fibrin integrity of L-PRF membranes (A-B-C) Histologic haemalum and eosin staining of (A) fresh venous L-PRF membrane, (B) 1 week cultured venous L-PRF membrane and (C) 2 weeks cultured venous L-PRF membrane. (D) Cell viability in fresh, 1 week cultured and 2 weeks cultured venous L-PRF membrane samples. (E) D-dimers indicating fibrin degradation in arterial vs. venous blood after 1 week culture
