Tehran University of Medical Sciences Health Technology Assessment in Action 2645-3835 4 2 2021 03 06 Review of the challenges for Health Technology Assessment in the world 28 28 Adele Talebi Tehran university of medical sciences 2020 05 31 2020 12 01 Heaelth technology assessment perform important role in health system decision making.Most of countries with the use of result of assessment in health systems decision making contribute to improve of efficiency allocative in their health systems. https://htainaction.tums.ac.ir/index.php/hta/article/view/28 https://htainaction.tums.ac.ir/index.php/hta/article/download/28/33