1. Department of Emergency Medicine, Emory University School of Medicine, Atlanta, GA
2. Department of Anesthesiology, Emory School of Medicine, Atlanta, GA
3. Department of Medicine, Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Emory School of Medicine, Atlanta, GA
4. Department of Medicine, Division of Digestive Diseases, Emory University School of Medicine, Atlanta, GA, USA
5. Center for Forensic Science Research and Education, Fredric Rieders Family Foundation, Willow Grove, PA, USA
6. Emory University School of Medicine, Atlanta, GA, USA
7. Division of Gastroenterology, University of CA, Irvine, CA, USA