Platelet-rich Fibrin (PRF) Gel Modified by a Carbodiimide Crosslinker for Tissue RegenerationFatemeh Karimi & Esmaeil Biazar & Saeed Heidari-Keshel & Bahareh Pourjabbar & Mohammad Reza Khataminezhad & Shervin Shirinbakhsh & S. Yasaman Zolfaghari-MoghaddamPDF1.3 MBEN