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Open-Access Journal
Opinion Review
Minireviews
Retrospective Cohort Study
Daniel Heise, Jan Bednarsch, Andreas Kroh, Sandra Schipper, Roman Eickhoff, Marielle Coolsen, Ronald Van Dam, Sven Lang, Ulf Neumann, Florian Ulmer 
World J Gastrointest Surg 13(1):19-29. Published online Jan 27, 2021. doi: 10.4240/wjgs.v13.i1.19
Retrospective Study
Vyacheslav Egorov, Roman Petrov, Aleksandr Schegolev, Elena Dubova, Andrey Vankovich, Eugeny Kondratyev, Andrey Dobriakov, Dmitry Kalinin, Natalia Schvetz, Elena Poputchikova 
World J Gastrointest Surg 13(1):30-49. Published online Jan 27, 2021. doi: 10.4240/wjgs.v13.i1.30
Filippo Melli, Ilenia Bartolini, Matteo Risaliti, Rosaria Tucci, Maria Novella Ringressi, Paolo Muiesan, Antonio Taddei, Amedeo Amedei 
World J Gastrointest Surg 13(1):50-75. Published online Jan 27, 2021. doi: 10.4240/wjgs.v13.i1.50
Systematic Reviews
Sami Akbulut, Khaled Demyati, Cemalettin Koc, Adem Tuncer, Emrah Sahin, Mehmet Ozcan, Emine Samdanci 
World J Gastrointest Surg 13(1):76-86. Published online Jan 27, 2021. doi: 10.4240/wjgs.v13.i1.76
Case Report