Othman, S.I. and Ali, F.A. 2023. Molecular Comparative Study of Virulence Factors Produced by Gram-Negative Bacteria Isolated from Several Cancer Cases and NonCancer Patients in Erbil Governorate, Iraq. Polytechnic Journal. 12, 2 (Apr. 2023), 92-99. DOI:https://doi.org/10.25156/ptj.v12n2y2022.pp92-99.