Lidocaine Gel or Spray During Upper Gastrointestinal Endoscopy: Efficacy and Safety Randomized Controlled Evaluation of Topical Pharyngeal Anesthesia. - Elsawy A; Alfeky A; Elbadawy M; Abouelnour A; Hegab M; Moursi S; Khalil A; Ezzelarab M; Ramadan H; Zabady M; Elshamy M; Ali H; et al. (La Clinica terapeutica, 2026)