title: Expression of Concern: "Prevention of Nausea and Vomiting After Middle Ear Surgery: Granisetron Versus Ramosetron," "Prevention of Vomiting After Tonsillectomy in Children: Granisetron Versus Ramosetron," and "Granisetron, Droperidol, and Metoclopramide for Preventing Postoperative Nausea and Vomiting After Thyroidectomy" by Dr Yoshitaka Fujii.