1. *Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA;
2. †Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA;
3. ‡Harvard Stem Cell Institute, Boston, MA;
4. §Harvard Medical School, Boston, MA;
5. ¶Shriners Burns Hospital, Boston, MA; and
6. ‖Center for Engineering in Medicine and Surgery, Department of Surgery, Harvard Medical School, Boston, MA