Margarita Salvadó ⁎ 
Microbiology Laboratory, Reference Laboratory of Catalunya, Barcelona, Spain
Universitat Autonòma de Barcelona (UAB), Department of Molecular Genetics and Microbiology, Spain
Virginia Plasencia
Microbiology Laboratory, Reference Laboratory of Catalunya, Barcelona, Spain
Concha Segura, Julià Gómez
Microbiology Laboratory, Reference Laboratory of Catalunya, Barcelona, Spain
Universitat Autonòma de Barcelona (UAB), Department of Molecular Genetics and Microbiology, Spain
Ma José Medina, Juan Antonio Sáez-Nieto
Bacteriology Unit, National Centre of Microbiology, Carlos III Health Institute, Madrid, Spain
Sandra Castellanos, Juan Pablo Horcajada
Infectious Diseases Service, Department of Internal Medicine, Hospital del Mar, Barcelona, Spain