11. Which of the following research designs would be the MOST optimal in terms of controlling the study and producing valid results for a clinical trial comparing two drugs?
发布于 2021-04-25 21:53:49
【单选题】 A Prospective, randomized, double-blind parallel study B Prospective experimental with historical control, open-label, comparative study C Observational, double-blind parallel study D Retrospective, parallel, longitudinal, open-label study
