Fig. 2From: Phototherapy techniques for the management of musculoskeletal disorders: strategies and recent advancesMechanism of mild PTT regulating bone regeneration. (BMP-2, Bone morphogenetic protein-2; TGF-β1, Transforming growth factor-β1; PDGF-BB, Platelet-derived growth factor-BB; VEGF, Vascular endothelial growth factor; MSC, Mesenchymal stem cell.)Back to article page