1. Brookdale University Hospital and Medical Center, Department of Pediatrics , Brooklyn, New York, USA; Al Thawra Modern General Hospital, Department of Emergency Medicine, Sana’a City, Yemen
2. Al Thawra Modern General Hospital, Department of Emergency Medicine, Sana’a City, Yemen
3. McLaren Oakland/Michigan State University, Department of Emergency Medicine, Pontiac, Michigan, USA
4. Royal Holloway University of London, Department of Health Studies, Egham Hill, Egham, Surrey TW20 0EX, United Kingdom
5. Harvard University & T.H. Chan School of Public Health, Harvard Humanitarian Initiative, Cambridge, Massachusetts, USA