Impact of Pyloric Injection of Magnesium Sulfate-Lidocaine Mixture on Postoperative Nausea and Vomiting After Laparoscopic Sleeve Gastrectomy: a Randomized-Controlled Trial. - Fathy M; Abdel-Razik MA; Elshobaky A; Emile SH; El-Rahmawy G; Farid A; Elbanna HG (Obesity surgery, 2019)