Rates of, and risk factors for, severe infections in patients with systemic autoimmune diseases receiving biological agents off-label
Cándido Díaz-Lagares, Roberto Pérez-Alvarez, Francisco J García-Hernández, María M Ayala-Gutiérrez, José L Callejas, Agustín Martínez-Berriotxoa, Javier Rascón, Luis Caminal-Montero, Albert Selva-O'Callaghan, Joaquim Oristrell, Carmen Hidalgo, Ricardo Gómez-de-la-Torre, Luis Sáez, Jesús Canora-Lebrato, María-Teresa Camps, Norberto Ortego-Centeno, María-Jesús Castillo-Palma, Manuel Ramos-Casals* and the BIOGEAS Study Group