Topical anesthesia: to use or not to use--that is the question.
Isenberg
G
G
D000772:Anesthesia, Local; D016099:Endoscopy, Gastrointestinal / Q000009:adverse effects*; D006801:Humans; D010146:Pain / Q000209:etiology / Q000517:prevention & control*; D010614:Pharynx