Safety measures for COVID-19: a review of surgical preparedness at four major medical centres in Saudi Arabia oleh Mohammad A. Alsofyani, Haifaa M. Malaekah, Ahmed Bashawyah, Mohammed Bawazeer, Khalid Akkour, Sultan Alsalmi, Abdu Alkhairy, Nayef Bin Dajim, Salahaddeen Khalifah, Ibrahim A. Almalki, Farid Kassab, Mohammad Barnawi, Mosfer Almalki, Mohammed Alharthi, Majed Alharthi, Abdulaziz Almalki, Abdullah H. Almalki, Anouar Bourghli, Ibrahim Obeid