1. Handbook of statistical methods for randomized controlled trials;Kim,2021
2. Randomised controlled trials—the gold standard for effectiveness research;Hariton;BJOG An Int J Obstet Gynaecol,2018
3. Introduction to randomized controlled clinical trials;Matthews,2006
4. Potential pitfalls in the design and reporting of clinical trials;Sydes;Lancet Oncol,2010
5. Design of observational studies;Rosenbaum,2021