Platelet counts of subjects' whole blood and PRP processed blood will be analyzed. Platelet counts in whole blood vary by individual. The optimal quantity of platelets and growth factors required for tissue healing is not known, but a clinically effective concentration has been described as being greater than 4 times baseline autologous whole blood platelet concentrations. Therefore, platelet concentration yield may have important implications in clinical outcome correlation. In order to validate consistent platelet concentration yields across subjects, investigators will sample 1 mL of whole blood (approximately one lab Vacutainer) and an additional 1 mL of platelet rich plasma for lab analysis of platelet concentration using a standard lab automated analyzer. This extra 1 ml of whole blood will be drawn at the same time that the 35 ml described above is drawn.