Frequency of Hepatitis B, C and HIV Infections among Transfusion-Dependent Beta Thalassemia Patients in Dhaka oleh Golam Sarower Bhuyan, Aftab Uz Zaman Noor, Rosy Sultana, Farjana Akther Noor, Nusrat Sultana, Suprovath Kumar Sarker, Muhammad Tarikul Islam, Md. Abu Sayeed, Md. Imam Ul Khabir, A. K. M. Ekramul Hossain, Zebunnesa Zeba, Syeda Kashfi Qadri, Md. Ruhul Furkan Siddique, Syed Saleheen Qadri, Firdausi Qadri, Kaiissar Mannoor