Hematuria in patients with IgA nephropathy after vaccine for SARS-CoV-2 Leonardo Calle Garcia; Carmen Martin Varas; Giomar Urzola Rodriguez; Maria Marcos Hidalgo; Astrid Rodriguez Gomez; Alvaro Molina Ordas; Veronica Fidalgo Gonzalez; Pablo Sanchez Garrote; Paulo Garcia Gutierrez; Marta Garcia de Burgos; Maria Jose Fernandez-Reyes Luis;