[1] Hosp Lhospitalet, Servei Anal Clin Microbiol, Consorci Sanitari Integral, Barcelona 08906, Spain
[2] Inst Salud Carlos III, Ctr Nacl Microbiol, Madrid, Spain
[3] Hosp Llobregat, Ciutat Sanitaria & Univ Bellvitge, Hosp Princeps Espanya, Barcelona, Spain
[4] Hosp Esperit Sant, Santa Coloma Gramenet, Barcelona, Spain