Fig.7 Growth factor detection using antibody arrays^［20］.

(a) Fresh PRP
Growth factors such as PDGF AB, VEGF R2, TGF-β, and EGF were detected as spots. Each detailed location is shown in the scheme.

(b) PRP in RT stored for 8 weeks
Almost all growth factors disappeared.

(c) Frozen PRP stored for 8 weeks
Thinner but significant spots were detected.

(d) Freeze dried PRP stored for 8 weeks
Almost all growth factors were observed as robust spots.