Interested in Platelet-Rich Plasma? We are conducting a study to examine how a blood protein product, platelet-rich plasma (PRP) may be associated with the way people walk. We are recruiting people who meet the following: • Above 18 years of age • Healthy individuals, OR - • Individuals with a history of bone or joint disease • Willing to come in for three appointments for gait analysis • Willing to give one small sample of blood Potential benefits to you include: • No-cost analysis of your walking This research is being conducted under the direction of Dr. Constance Chu. To see if you are eligible for this study, please reply using the supost box.