Autologous Platelet Gel: An In Vitro Analysis of Platelet-Rich Plasma Using Multiple CyclesKevin Christensen, See Vang, Chad Brady, Jack Isler, Keith Allen, John Anderson and David HoltJ Extra Corpor Technol, 38 3 (2006) 249-253DOI: https://doi.org/10.1051/ject/200638249