Efficacy and Safety of Very Low-Volume Bowel Preparation With 1L Plenvu Comparison With 2L Peg-Asc: Multicenter, Randomized, Endoscopist-Blinded Study - Hong, SN; CK, Lee; PIm, J; CH, Choi; JS, Byeon; YS, Cho; SA, Jung; TI, Kim; YT, Jeen (Endoscopy, 2021)