?:authorAffiliation
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[\'King Abdulaziz Medical City, Riyadh 14611, Saudi Arabia.\', \'School of Medicine, John Hopkins University, Baltimore, MD 21205, USA.\', \'King Faisal Specialist Hospital and Research Center, Riyadh 11564, Saudi Arabia.\', \'Department of Emergency Medical Services, Prince Sultan Bin Abdulaziz College Emergency Medical Services, King Saud University, Riyadh 11451, Saudi Arabia.\']
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