1. Ono Y, Yao K, Takaki Y, et al. Efficacy of endoscopy under general anesthesia for the detection of synchronous lesions in oro-hypopharyngeal cancer. Clin Endosc. 2023; 56:315–324.
2. Noh JH, Kim DH. Endoscopy under general anesthesia for detecting synchronous lesions of head and neck squamous cell carcinoma. Clin Endosc. 2023; 56:308–309.