Dr. Bohdan Pomahac, who leads the plastic surgery team for the full face transplant of Dallas Wiens, enters the operating room at Brigham and Women's Hospital with donor tissue in a cooler in Boston, Massachusetts in this undated handout photograph. Twenty five year-old Wiens from Texas has received the first full face transplant done in the United States, Boston's Brigham and Women's Hospital said on March 21, 2011. More than 30 physicians, nurses, anesthesiologists and residents worked for more than 15 hours to replace the nose, lips, facial skin, muscles of facial animation and nerves of Dallas Wiens, disfigured in an electrical accident in 2008. [Xinhua/AFP Photo]