1. Obstetrics Anesthesia Fellow, Department of Anesthesiology, Obstetrical Division, Columbia University, New York, New York.
2. Assistant Clinical Professor, Department of Obstetrics and Gynecology, Division of Maternal Fetal Medicine, Columbia University.
3. Associate Professor of Clinical Radiology, Department of Radiology, Division of Ultrasound, Columbia University.
4. Professor of Clinical Anesthesiology, Department of Anesthesiology, Division of Obstetrical Anesthesiology, Columbia University.