Convalescent plasma therapy in an immunocompromised patient with multiple COVID‐19 flares: a case report. - Karaolidou, Frini; Loutsidi, Natasa‐Eleni; Mellios, Zois; Jahaj, Edison; Eleftheriou, Konstantinos; Pagoni, Maria; Mpaltadakis, Ioannis; Dimopoulos, Athanasios‐Meletios; Kalomenidis, Ioannis; Pappas, Apostolos G. (Respirology Case Reports, 2021)