Heterogeneity of regional and national hospitalization burden of lupus nephritis and systemic lupus erythematous - Avello, Alejandro; Fernandez-Prado, Raul; Abasheva, Daria; Mahillo, Ignacio; Gonzalez-Gay, Miguel Angel; Martin-Cleary, Catalina; Perez-Gomez, Maria Vanessa; Fernandez-Fernandez, Beatriz; Ortiz, Alberto (CLINICAL KIDNEY JOURNAL, 2025)