Fig. 4From: Platelet-rich plasma stimulates angiogenesis in mice which may promote hair growthEffect of platelet-rich plasma (PRP) on angiogenesis by immunohistochemistry. a Positive vessels detected by immunohistochemical staining in the control, platelet-poor plasma (PPP), and PRP group, original magnification × 250. Arrows stand for positive vessels. b The relative number of vessels in the three groups. *p < 0.05 vs. control groupBack to article page