R. Samar, S. K. Dodani, J. Qureshi, H. Moin, and S. K. Badlani, “Sero-prevalence of syphilis, risk factors and clinical characteristics among blood donors in a tertiary care hospital in Karachi, Pakistan”, Infect Dis J Pak, vol. 34, no. 3, pp. 164–169, Sep. 2025.