“Clinical Stability” and Propensity Score Matching in Cardiac Surgery: is the clinical evaluation of treatment efficacy algorithmdependent in small sample size settings? ebph [Internet]. 2022 Feb. 11 [cited 2026 Jul. 27];16(1). Available from: https://test-ojs-unimi-it.archicoop.it/index.php/ebph/article/view/17307