1. University of Michigan Medical School Ann Arbor Michigan USA
2. Department of Emergency MedicineGeorge Washington University School of Medicine and Health Sciences Washington DC USA
3. Department of Obstetrics and GynecologyUniversity of Chicago Chicago Illinois USA
4. Center for Nondestructive EvaluationIowa State University, Ames Iowa USA
5. Department of Biomedical EngineeringUniversity of Rochester, Rochester New York USA
6. Department of Emergency MedicineMaimonides Medical Center, Brooklyn New York USA
7. Acoustic Measurements, Philips Healthcare, Bothell Washington USA
8. Center for Devices and Radiological Health, United States Food and Drug Administration (retired) Silver Spring Maryland USA
9. Department of Emergency MedicineChristiana Hospital, Newark Delaware USA