“Knowledge Assessment of the Employees in Heart Center about the Psychological Risk of the Occupation in Al-Nasiriyah - Dhi-Qar Governorate During COVID 19 Pandemic: A Cross-Section Study”. 2023. University of Thi-Qar Journal of Science 10 (1(SI): 205-9. https://doi.org/10.32792/utq/utjsci/v10i1(SI).1074.