1Intensive Care Unit, Hospital Universitario de Valme, Universidad de Sevilla, Avenida Bellavista s/n, 41014 Sevilla, Spain
2Intensive Care Unit, Hospital León et al. Critical Care (2016) 20:149 Page 13 of 14 Universitario Dr. Negrín, Universidad de Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain
3Mathematics Department, Universidad de las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain
4Clinical Unit of Microbiology and Infectious Diseases, Hospital Universitario de Valme, Universidad de Sevilla, Sevilla, Spain
5Intensive Care Unit, Hospital Punta de Europa, Algeciras, Cádiz, Spain
6Intensive Care Unit, Hospital Universitario Miguel Servet, Zaragoza, Spain
7Service of Microbiology, Hospital Universitario Miguel Servet, Zaragoza, Spain
8Critical Care Department, Hospital Universitari Joan XXIII, Tarragona, Spain
9Service of Microbiology, Hospital Universitari Joan XXIII, Tarragona, Spain
© The Author(s). 2017
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