@article{cc811ae7db354c3faa3f2bbc815e2b13,
title = "Usefulness of the Valsalva maneuver without a mouthpiece to observe the hypopharynx using transoral endoscopy",
keywords = "Humans, Hypopharyngeal Neoplasms/diagnosis, Natural Orifice Endoscopic Surgery/methods, Valsalva Maneuver",
author = "Yasushi Yamasaki and Ryu Ishihara and Kenta Hamada",
year = "2017",
month = jul,
doi = "10.1111/den.12886",
language = "English",
volume = "29",
pages = "643--644",
journal = "Digestive Endoscopy",
issn = "0915-5635",
publisher = "Wiley-Blackwell",
number = "5",
}