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Open-Access Journal
Review
Ayan Roy, Jayaprakash Sahoo, Sadishkumar Kamalanathan, Dukhabandhu Naik, Pazhanivel Mohan, Raja Kalayarasan 
World J Gastroenterol 27(30):4939-4962. Published online Aug 14, 2021. doi: 10.3748/wjg.v27.i30.4939
Bharati Kadamb Patel, Kadamb H Patel, Madhav Bhatia, Shridhar Ganpati Iyer, Krishnakumar Madhavan, Shabbir M Moochhala 
World J Gastroenterol 27(30):5019-5036. Published online Aug 14, 2021. doi: 10.3748/wjg.v27.i30.5019
Minireviews
Tsvetelina Velikova, Violeta Snegarova, Alexander Kukov, Hristiana Batselova, Antoaneta Mihova, Radislav Nakov 
World J Gastroenterol 27(30):5047-5059. Published online Aug 14, 2021. doi: 10.3748/wjg.v27.i30.5047
Basic Study
Clinical and Translational Research
Retrospective Study
Observational Study
Prospective Study
Mar Riveiro-Barciela, Cristina Marcos-Fosch, Fernando Martinez-Valle, Fabrizio Bronte, Olimpia Orozco, Isidro Sanz-Pérez, Daniele Torres, Maria-Teresa Salcedo, Salvatore Petta, Rafael Esteban, Antonio Craxi, Maria Buti 
World J Gastroenterol 27(30):5112-5125. Published online Aug 14, 2021. doi: 10.3748/wjg.v27.i30.5112