Table of contents

PostScript

• Letter: Walled of necrosis, disconnected pancreatic duct and metal stents: the debate continues! (9 November, 2020)

  Surinder Singh Rana, Rajesh Gupta
• Letter: Zonulin measurement conundrum: add confusion to confusion does not lead to clarity (11 November, 2020)

  Alessio Fasano
• Letter: Is HBV RNA a valid marker for predicting sustained viral response for nucleoside analogue cessation? (6 November, 2020)

  Babu Lal Meena, Madhumita Premkumar, Akash Roy, Virendra Singh
• Letter: To WE, or not to WE, that is the question (17 November, 2020)

  Felix W Leung, Joseph W Leung
• Letter: Upregulation of enteric alpha-synuclein as a possible link between inflammatory bowel disease and Parkinson’s disease (17 November, 2020)

  Pascal Derkinderen, Wendy Noble, Michel Neunlist, Malvyne Rolli-Derkinderen
• Letter: Proton pump inhibitor or famotidine use and severe COVID-19 disease: a propensity score-matched territory-wide study (4 December, 2020)

  Jiandong Zhou, Xiansong Wang, Sharen Lee, William Ka Kei Wu, Bernard Man Yung Cheung, Qingpeng Zhang, Gary Tse
• Letter: Proton pump inhibitors and the risk of severe COVID-19: a post-hoc analysis from the Korean nationwide cohort (10 December, 2020)

  Seung Won Lee, Jee Myung Yang, In Kyung Yoo, Sung Yong Moon, Eun Kyo Ha, Abdullah Özgür Yeniova, Joo Young Cho, Min Seo Kim, Jae Il Shin, Dong Keon Yon
• Letter: Serotonin is elevated in COVID-19-associated diarrhoea (5 January, 2021)

  Seeun Ha, Byungchang Jin, Brooke Clemmensen, Paul Park, Sumaiya Mahboob, Vadim Gladwill, Farah Madhani Lovely, Andres Gottfried-Blackmore, Aida Habtezion, Subhash Verma, Seungil Ro
• Letter: Aerosol generation and droplet spread during nasogastric intubation in the COVID-19 era (31 December, 2020)

  Wout Verbeure, Annelies Geeraerts, I-Hsuan Huang, Lien Timmermans, Joran Toth, Hannelore Geysen, Louise Cools, Florencia Carbone, Jolien Schol, Herman Devriese, Rico Haesaerts, Hideki Mori, Tim Vanuytsel, Jan Tack
• Letter: COVID-19 and endoscopic services: the impact of delays in therapeutic colonoscopies on patients (4 February, 2021)

  Syazeddy Samani, Nasir Mir, David N Naumann, Michael Ding, Sharad Karandikar, Jason Goh, Marietta Iacucci, Marcus Mottershead, Vanja Giljaca
• Letter: Association between 5-aminosalicylates in patients with IBD and risk of severe COVID-19: an artefactual result of research methodology? (3 March, 2021)

  Mohamed Attauabi, Jakob Seidelin, Johan Burisch