Fasting and postprandial acyl and desacyl ghrelin and the acyl/desacyl ratio in obese patients before and after different types of bariatric surgery - Jolanta A. Dardzińska; Łukasz Kaska; Monika Proczko-Stepaniak; Maria Szymańska-Gnacińska; Ewa Aleksandrowicz-Wrona; Sylwia Małgorzewicz (Videosurgery and Other Miniinvasive Techniques)