1. Fertility & Hormone Preservation & Restoration Program Division of Pediatric Surgery Ann & Robert H. Lurie Children's Hospital of Chicago Chicago Illinois USA
2. Division of Pediatric Surgery Department of Surgery Feinberg School of Medicine Northwestern University Chicago Illinois USA
3. Stanley Manne Children's Research Institute Ann & Robert H. Lurie Children's Hospital of Chicago Chicago Illinois USA
4. Division of Hematology Oncology, Neuro‐Oncology & Stem Cell Transplantation Ann & Robert H. Lurie Children's Hospital of Chicago Chicago Illinois USA
5. Department of Pediatrics Feinberg School of Medicine Northwestern University Chicago Illinois USA
6. Division of Endocrinology Department of Pediatrics Feinberg School of Medicine Northwestern University Chicago Illinois USA
7. Department of Obstetrics and Gynecology Feinberg School of Medicine Northwestern University Chicago Illinois USA