Autoantibodies related to systemic autoimmune rheumatic diseases in severely ill patients with COVID-19. Issue 12 (24th June 2020) - Vlachoyiannopoulos, Panayiotis G; Magira, Eleni; Alexopoulos, Haris; Jahaj, Edison; Theophilopoulou, Katerina; Kotanidou, Anastasia; Tzioufas, Athanasios G