1. Department of Otorhinolaryngology–Head and Neck Surgery, Hospital Universitario Infanta Leonor, Madrid, Spain
2. Department of Medical Oncology, Hospital Universitario Puerta de Hierro, Majadahonda (Madrid), Spain
3. Emergency Department, Hospital Universitario Infanta Leonor, Madrid, Spain
4. Department of Anesthesia and Intensive Care, Hospital Universitario Infanta Leonor, Madrid, Spain
5. Department of Intensive Medicine, Hospital Universitario Infanta Leonor, Madrid, Spain