1 Department of Microbiology, Hospital Universitario Ramón y Cajal and IRYCIS, Madrid, Spain; CIBERINFEC, Instituto de Salud Carlos III, Spain. Electronic address: rosa.campo@salud.madrid.org.
2 CIBERINFEC, Instituto de Salud Carlos III, Spain; Department of Infectious Diseases, Hospital Universitario Ramón y Cajal and IRYCIS, Madrid, Spain.