Comparison of continuous epidural block and continuous paravertebral block in postoperative analgaesia after video-assisted thoracoscopic surgery lobectomy: a randomised, non-inferiority trial - Kosiński, S; Fryźlewicz, E; Wiłkojć, M; Ćmiel, A; Zieliński, M (Anaesthesiol Intensive Ther, 2016)