A. J. . Abdulkadhim, Nidhal Yousif Mohammed, and Dr. Murtadha Allawi Jebur, “The Study of Biomarkers inSmokers Infected with Covid-19 in Basra, Iraq”, International Journal Of Medical Science And Clinical Research Studies, vol. 3, no. 8, pp. 1655–1662, Aug. 2023.