1 ISGlobal, Hospital Clínic-Universitat de Barcelona, Barcelona, Spain.
2 Internal Medicine Department, Hospital Universitario Araba, Vitoria-Gasteiz, Spain.
3 Nephrology and Renal Transplantation Department, Centro de Referencia en Enfermedad Glomerular Compleja del Sistema Nacional de Salud (CSUR), Hospital Clínic-Universitat de Barcelona, Barcelona, Spain.
4 Internal Medicine Department, Hospital General Granollers, Barcelona, Spain.
5 Microbiology Department, Hospital Clínic de Barcelona, Barcelona, Spain.
6 Pathology Department, Hospital Clínic de Barcelona, Barcelona, Spain.