Table 1.

Literature searching strategy.

Database: MEDLINE (through PubMed)

#1 “artificial intelligence”[tiab] OR “AI”[tiab] OR “deep learning”[tiab] OR “machine learning”[tiab] OR “computer”[tiab] OR “neural network”[tiab] OR “CNN”[tiab] OR “automatic”[tiab] OR “automated”[tiab]: 536153 #2 “capsule endoscopy”[tiab] OR “capsule endoscopy”[Mesh]: 5136 #3 “protruded”[tiab] OR “polyp”[tiab] OR “tumor”[tiab] OR “tumors”[Mesh] OR “polyps”[Mesh]: 1295552 #4 #1 AND #2 AND #3: 52 #5 #4 AND English[Lang]: 51

Database: Web of Science

#1 artificial intelligence OR AI OR deep learning OR machine learning OR computer OR neural network OR CNN OR automatic OR automated: 130090 #2 capsule endoscopy: 3549 #3 protruded OR polyp OR tumor: 840061 #3 #1 AND #2 AND #3: 110

Database: Cochrane Library

#1 artificial intelligence:ab,ti,kw or AI:ab,ti,kw or deep learning:ab,ti,kw or machine learning:ab,ti,kw or computer:ab,ti,kw or neural network:ab,ti,kw or CNN:ab,ti,kw or automatic:ab,ti,kw or automated:ab,ti,kw: 60782 #2 MeSH descriptor: [capsule endoscopy] explode all trees: 132 #3 capsule endoscopy:ab,ti,kw: 726 #4 #2 or #3: 726 #5 MeSH descriptor: [tumors] explode all trees: 83592 #6 MeSH descriptor: [polyps] explode all trees: 1165 #7 protruded:ab,ti,kw or tumor:ab,ti,kw or polyp:ab,ti,kw: #8 #5 or #6 or #7: 134070 #9 #1 and #4 and #8: 5

CAD, computer-aided diagnosis; WCE, wireless capsule endoscopy; tiab, searching code for title and abstract; Mesh, Medical Subject Headings; ab,ti,kw, searching code for abstract, title, and keywords; Lang, searching code for language; lim, searching code by limiting certain conditions.