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Open-Access Journal
Review
Minireviews
Retrospective Cohort Study
Karina Gordon, Estela Regina Ramos Figueira, Joel Avancini Rocha-Filho, Luiz Antonio Mondadori, Eduardo Henrique Giroud Joaquim, Joao Seda-Neto, Eduardo Antunes da Fonseca, Renata Pereira Sustovitch Pugliese, Agustin Moscoso Vintimilla, Jose Otavio Costa Auler Jr, Maria Jose Carvalho Carmona, Luiz Augusto Carneiro D'Alburquerque 
World J Gastroenterol 27(12):1161-1181. Published online Mar 28, 2021. doi: 10.3748/wjg.v27.i12.1161
Retrospective Study
Guang-Zi Shi, Hong Chen, Wei-Ke Zeng, Ming Gao, Meng-Zhu Wang, Hui-Ting Zhang, Jun Shen 
World J Gastroenterol 27(12):1182-1193. Published online Mar 28, 2021. doi: 10.3748/wjg.v27.i12.1182
Observational Study
Jamie Zhen, Juan Pablo Stefanolo, María de la Paz Temprano, Caroline L Seiler, Alberto Caminero, Enrique de-Madaria, Miguel Montoro Huguet, Vivas Santiago, Sonia Isabel Niveloni, Edgardo Gustavo Smecuol, Luis Uzcanga Dominguez, Elena Trucco, Virginia Lopez, Carolina Olano, Pasquale Mansueto, Antonio Carroccio, Peter H Green, Donald Duerksen, Andrew S Day, Jason A Tye-Din, Julio César Bai, Carolina Ciacci, Elena F Verdú, Benjamin Lebwohl, M Ines Pinto-Sanchez 
World J Gastroenterol 27(12):1213-1225. Published online Mar 28, 2021. doi: 10.3748/wjg.v27.i12.1213
Natália Sousa Freitas Queiroz, Fábio Vieira Teixeira, Marina Pamponet Motta, Liliana Andrade Chebli, Adriano Akira Ferreira Hino, Camilla de Almeida Martins, Abel Botelho Quaresma, Alexandre Augusto de Paula da Silva, Adérson Omar Mourão Cintra Damião, Rogerio Saad-Hossne, Paulo Gustavo Kotze 
World J Gastroenterol 27(12):1226-1239. Published online Mar 28, 2021. doi: 10.3748/wjg.v27.i12.1226
Meta-Analysis
Panupong Hansrivijit, Angkawipa Trongtorsak, Max M Puthenpura, Boonphiphop Boonpheng, Charat Thongprayoon, Karn Wijarnpreecha, Avishek Choudhury, Wisit Kaewput, Shennen A Mao, Michael A Mao, Caroline C Jadlowiec, Wisit Cheungpasitporn 
World J Gastroenterol 27(12):1240-1254. Published online Mar 28, 2021. doi: 10.3748/wjg.v27.i12.1240