IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-10-9-36794 Original Research Paper Evaluation of Reasons of Pre-donation Blood Donor Deferral in a Tertiary care Hospital at Dhaka Daanish Arefin Biswas Dr. Dr. Md. Wasim Dr. Dr. Hasiba Akter Bhuiyan Dr. September 2021 10 9 01 02