Intensive Care Unit, Vega Baja Hospital of Orihuela, Orihuela, Alicante, Spain. Department of Clinical Medicine, Miguel Hernandez University, San Juan de Alicante, Alicante, Spain. Intensive Care Unit, General University Santa Lucia Hospital of Cartagena, Cartagena, Murcia, Spain. Intensive Care Unit, University Hospital of San Juan de Alicante, San Juan de Alicante, Alicante, Spain. Intensive Care Unit, Lluis Alcanyis Hospital of Xativa, Xativa, Valencia, Spain. Intensive Care Unit, Marina Baixa Hospital of Villajoyosa, Villajoyosa, Alicante, Spain. Intensive Care Unit, General University Hospital of Alicante, Alicante, Alicante, Spain. Intensive Care Unit, La Plana Hospital of Villarreal, Villarreal, Castellon, Spain. Intensive Care Unit, Francesc de Borja Hospital of Gandia, Gandia, Valencia, Spain. Department of Clinical Medicine, Miguel Hernandez University, San Juan de Alicante, Alicante, Spain antonio.pb23@gmail.com.