Comparison of the i-gelTM and the LMA ProsealTM in anesthetized patients undergoing laparoscopic cholecystectomy: a prospective, randomized clinical trial - Beleña, José M.; Núñez, Mónica; Vidal, Alfonso; Gasco, Carmen; Yuste, Javier; Kahn, Amjad (Anaesthesia, Pain & Intensive Care, 2019)