A. A. Mirza, M. A. Alsakkaf, A. A. Mohammed, A. A. Mirza, and S. A. Elmorsy, “Patterns of emergency department visits during Hajj period: Towards healthcare optimization in view of Saudi Arabia’s vision 2030: Emergency visit patterns during Hajj”, Pak J Med Sci, vol. 35, no. 3, May 2019.