Sarah Murnaghan, an 11-year-old girl who underwent a double lung transplant, sits on her mother Janet's lap outside their home in Newtown Square, Pennsylvania August 27, 2013. Sarah underwent an operation earlier this summer to receive the transplants in a case that set off a national debate about child access to organ donations. She had earlier been diagnosed with cystic fibrosis. REUTERS/Tom Milahek (UNITED STATES - Tags: HEALTH)