1. Department of Anesthesiology and Perioperative Medicine, UPMC Children’s Hospital of Pittsburgh, University of Pittsburgh Medical Center, 4401 Penn Avenue, Pittsburgh, PA 15224, USA
2. Department of Anesthesiology and Perioperative Medicine, University of Pittsburgh Medical Center, Pittsburgh, PA 15213, USA
3. Department of Anesthesiology and Perioperative Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA
4. Department of Radiology, UPMC Children’s Hospital of Pittsburgh, Pittsburgh, PA 15224, USA