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The coronavirus disease 2019 (COVID-19) pandemic emerged in Wuhan, China, in late 2109, and has rapidly spread around the world. Until May 25, 2020, there were 133,521 confirmed COVID-19 cases and 7359 deaths in Iran. The role of opportunistic fungal infections in the morbidity and mortality of COVID-19 patients remains less defined. Based on our multicenter experiences, we categorized the risks of opportunistic fungal infections in COVID-19 patients in Iran. The COVID-19 patients at high risk included those with acute respiratory distr

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Radiation from CT (computerized tomography), poses risk of radiation associated cancer. Studies indicate a cumulative dose of 50mGy triples the risk of leukemia and a dose of 60mGy triples the risk of brain tumors in children. This study aimed to assess the application of "Justification and Optimization Principles of ALARA (As Low As Reasonably Achievable)" in pediatric CT. A prospective cross-sectional study was conducted from December 2017 to July 2018 G.C at Tikur Anbessa Specialized Hospital. CT request forms were reviewed. All