Convalescent Plasma Treatment of Patients Previously Treated with B-Cell-Depleting Monoclonal Antibodies Suffering COVID-19 Is Associated with Reduced Re-Admission Rates oleh Petros Ioannou, Athanasios Katsigiannis, Ioanna Papakitsou, Ioannis Kopidakis, Eirini Makraki, Dimitris Milonas, Theodosios D. Filippatos, George Sourvinos, Marina Papadogiannaki, Evaggelia Lydaki, Georgios Chamilos, Diamantis P. Kofteridis