ACL Injury: A Multidisciplinary Evaluation Study Principal Investigator: Constance R. Chu, MD Research Subjects Wanted 18-60 years old male or female Earn $100 by participating in a research study about joint health after ACL injury Please respond if you have had an ACL injury. As a participant, you will receive: - MRI and X-rays of both knees - Movement pattern analysis - Blood test - $100 Study will take place at Stanford University and the VA Hospital in Palo Alto. If you are interested in participating, please email us.