In this July 2, 2012 copy photo a chart provided by the Laboratory for Tissue Engineering and Organ Fabrication at Massachusetts General Hospital, depicts the progression, from left to right, of implanted tissue engineered for ear development and construction, at the lab in Boston. Scientists are growing ears, bone and skin in the lab, and doctors are planning more face transplants and other extreme plastic surgeries. Around the country, the most advanced medical tools that exist are now being deployed to help America's newest veterans and wounded troops. (AP Photo/Laboratory for Tissue Engineering and Organ Fabrication at Massachusetts General Hospital)