Teimourpour A, Mpghtadaee M, Amini- kafiabad S, Maghsoodlu M, Rafiee M. Investigating the trend of look-back units in the plasma for contract fractionation during 2018-2021. Journal of Iranian Blood Transfusion 2024; 21 (3) :180-190 URL: http://bloodjournal.ir/article-1-1554-en.html