Impact on aerosol generation during upper endoscopy of mouthpiece designed to reduce COVID-19 droplet spread: single-center randomized controlled trial - Huang, I-Hsuan; Sinonquel, Pieter; Verbeure, Wout; Camps, Chelsea; Devriese, Herman; Holvoet, Lieselot; Verstockt, Bram; Willekens, Hilde; Mori, Hideki; Bisschops, Raf; Tack, Jan (Endoscopy, 2021)