Faheem Ud Din, Babar Ishaq, Talat Ramzan, Muhammad Shuaib, Tahreem Raza, Noor Khajjak. “Screening For Prior Exposure to Hepatitis B Virus Infection in Patients Undergoing Chemotherapy”. Pakistan Journal of Medical & Health Sciences, vol. 16, no. 03, Apr. 2022, p. 596, doi:10.53350/pjmhs22163596.