Sgherza N, Curci P, Rizzi R, Strafella V, Di Gennaro D, Vitucci A, Palma A, Rossi AVR, Albano F, Stefanizzi P, Tafuri S, Musto P. Incidence and outcome of SARS-CoV-2 infection in patients with monoclonal gammopathy of undetermined significance: a case-control study. Haematologica 2022;107(2):555-557; https://doi.org/10.3324/haematol.2021.279895.