1. Harvard Medical School, Boston, Massachusetts, USA.
2. Center for Gender Surgery, Boston Children's Hospital, Boston, Massachusetts, USA.
3. Department of Plastic and Oral Surgery, Boston Children's Hospital, Boston Massachusetts, USA.
4. Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA.
5. Division of Adolescent Medicine, Boston Children's Hospital, Boston, Massachusetts, USA.