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1. Gastrointestinal bleeding and endoscopic findings in critically and non‐critically ill patients with corona virus disease 2019 (COVID‐19): Results from Lean European Open Survey on SARS‐CoV‐2 (LEOSS) and COKA registries. Issue 9 (15th October 2021)

2. One year of COVID-19 pandemic: Health care workers' infection rates and economical burden in medical facilities for oral and maxillofacial surgery. Issue 11 (November 2022)