Erratum: "Fourth-generation chemiluminescence QuantiFERON-TB Plus assay versus T-SPOT.TB semi-automated assay: a case for the use of both assays in immunosuppressed patients" Sergio Palacios-Penedo, Miguel Arias-Guillén, Patricio Escalante , Cristian Castelló-Abietar, Iván Menéndez-Valle, Gema Ramírez-Parras, Primitivo Buendía-Romero,
