Tocilizumab for Severe Worsening COVID-19 Pneumonia: a Propensity Score Analysis. Roumier, Mathilde; Paule, Romain; Vallée, Alexandre; Rohmer, Julien; Ballester, Marie; Brun, Anne-Laure; Cerf, Charles; Chabi, Marie-Laure; Chinet, Thierry; Colombier, Marie-Alice; Farfour, Eric; Fourn, Erwan; Géri, Guillaume; Khau, David; Marroun, Ibrahim; Ponsoye, Matthieu; Roux, Antoine; Salvator, Hélène; Schoindre, Yoland; Si Larbi, Anne-Gaëlle; Tchérakian, Colas; Vasse, Marc; Verrat, Anne; Zuber, Benjamin; Couderc, Louis-Jean; Kahn, Jean-Emmanuel; Groh, Matthieu; Ackermann, Félix; Foch COVID-19 Study Group. Journal of Clinical Immunology. 2020; : . doi:10.1007/s10875-020-00911-6Article