Definition and evolution of the concept of sarcopenia Maria Luz Sanchez-Tocino; Secundino Cigarrán; Pablo Ureña; Maria Luisa González-Casaus; Sebastian Mas-Fontao; Carolina Gracia-Iguacel; Alberto Ortíz; Emilio Gonzalez-Parra;

IgA vasculitis with nephritis (Henoch-Schönlein purpura) after COVID-19: A case series and review of the literature Irene Oñate; Milagros Ortiz; Andrea Suso; Carmen Mon; Karen Galindo; Carolina Lentisco; Rosa Camacho; María Sánchez; Aniana Oliet; Olimpia Ortega; Juan C. Herrero; José A. Cortés; Alejandro Pascual;

Pharmacological nephrotoxicity profile in a comprehensive cancer center: What changed in two decades and predictors for the need for haemodialysis and mortality André Ferreira; Marina Reis; Teresa Chuva; Hugo Ferreira; Inês Coelho; Ana Paiva; José Maximino Costa;