**IS***6110* **the Double-Edged Passenger**

María del Carmen Menéndez1, Sofía Samper2,4, Isabel Otal3,4 and María Jesús García1 *1Autonoma University of Madrid, School of Medicine 2IIS Aragon, Hospital Universitario Miguel Servet 3University of Zaragoza, School of Medicine 4CIBER Enfermedades Respiratorias Spain* 
