What Is the Optimal Bowel Preparation for Capsule Colonoscopy and Pan-intestinal Capsule Endoscopy? A Systematic Review and Meta-Analysis.

"Declarations Conflict of interestThe authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. Conflict of interest The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest."

"Funding Open access funding provided by FCT|FCCN (b-on). This research received no specific grant from any funding agency in the public, commercial, or not-for-profit sectors."

"We performed a systematic review of which methodology followed the guidance of the Preferred Reporting Items for Systematic Review and Meta-Analyses (PRISMA) []. The review protocol was registered with the International Prospective Register of Systematic Reviews by the Centre for Reviews and Dissemination at the University of York (PROSPERO), with the ID: CRD42020176645. The protocol for this systematic review has been registered with the International Prospective Register of Systematic Reviews by the Centre for Reviews and Dissemination at the University of York (PROSPERO), with the ID: CRD42020176645."