Kopjar V. Clinical trial perceptions and knowledge: the results of three surveys administered to U.S. physicians, surgeons, nurses, clinic administrators and clinical research industry professionals. Int J Clin Trials [Internet]. 2022 Jan. 25 [cited 2026 Apr. 21];9(1):1-9. Available from: https://www.ijclinicaltrials.com/index.php/ijct/article/view/563