1. Department of Obstetrics, Gynecology, and Reproductive Sciences University of California, San Francisco San Francisco California USA
2. University of California San Francisco School of Medicine San Francisco California USA
3. Department of Anesthesiology Columbia University Irving Medical Center New York New York USA
4. Department of Neurology College of Physicians and Surgeons Columbia University New York New York USA
5. Department of Obstetrics and Gynecology Columbia University Irving Medical Center New York New York USA
6. Escola de Medicina Souza Marques (EMSM) Fundação Tecnico Educação Souza Marques Rio De Janeiro Brazil