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Open-Access Journal
Review
Minireviews
Daniel E Hogan, Michael Ma, David Kadosh, Alisha Menon, Kana Chin, Arun Swaminath 
World J Gastrointest Endosc 13(8):296-301. Published online Aug 16, 2021. doi: 10.4253/wjge.v13.i8.296
Retrospective Study
Flavio Roberto Takeda, Carlos de Almeida Obregon, Yasmin Peres Navarro, Diogo Turiani Hourneaux Moura, Ulysses Ribeiro Jr, Rubens Antonio Aissar Sallum, Ivan Cecconello 
World J Gastrointest Endosc 13(8):319-328. Published online Aug 16, 2021. doi: 10.4253/wjge.v13.i8.319
Prospective Study
Systematic Reviews
Meta-Analysis