1. Chair of COPD Miguel Hernandez University of Elche San Juan de Alicante Spain
2. Pneumology Unit San Juan de Alicante University Hospital San Juan de Alicante Spain
3. Research Unit San Juan de Alicante University Hospital San Juan de Alicante Spain
4. Clinical Medicine Department Miguel Hernandez University of Elche San Juan de Alicante Spain
5. Research Unit Elda University Hospital Elda Spain
6. Pneumology Unit Arnau de Vilanova Hospital Valencia Spain