Intensive Care Unit Mortality Trends during the First Two Years of the COVID-19 Pandemic in Greece: A Multi-Center Retrospective Study oleh Paraskevi C. Fragkou, Sotirios P. Karagiannis, Dimitra Dimopoulou, Sotiria Kefala, Fotini Fligou, Parisis Gallos, Edison Jahaj, Angeliki Bellou, Evangelia Koukaki, Eleni Magira, Philippos Orfanos, Georgios Papathanakos, Athanasios Papathanasiou, Emmanouil Pediaditis, Konstantinos Pontikis, Nikoletta Rovina, Katerina Vaporidi, Menelaos Xenikakis, Maria Theodorakopoulou, Anastasia Kotanidou