1. Georgetown University School of Medicine Washington DC USA
2. Department of Anesthesiology Duke University Hospital Durham NC USA
3. Department of Biomedical and Molecular Sciences School of Medicine Queen's University Kingston ON Canada
4. School of Baccalaureate Nursing St. Lawrence College Kingston ON Canada
5. Department of Obstetrics and Gynecology Division of Maternal Fetal Medicine The George Washington University School of Medicine and Health Sciences Washington DC USA