Panko P, Curtis J, Gorrall B, Little T. Alternatives to Randomized Control Trials: A Review of Three Quasi-experimental Designs for Causal Inference. AP [Internet]. 2015Nov.17 [cited 2024Nov.28];29(119):19-27. Available from: https://revistas.ucr.ac.cr/index.php/actualidades/article/view/18810