1. Politecnico di Milano, 18981, Department of Electronics, Information and Bioengineering, Milano, Lombardia, Italy;
2. Ludwig Boltzmann Institute for COPD and Respiratory Epidemiology, 1140, Austria
3. Department of Respiratory Medicine, Maastricht University Medical Center, Maastricht, Netherlands
4. Restech Srl, Milano, Italy
5. Politecnico di Milano, Dipartimento di Bioingegneria, Milano, Italy
6. Centre for Intergrated Rehabilitation of Organ failure (CIRO), Department of Research, Development and Education, HORN, Netherlands
7. Otto Wagner Hospital, Department for Respiratory and Critical Care Medicine, Vienna, Austria
8. Ludwig Boltzmann Institute for COPD and Respiratory Epidemiology, Vienna, Austria
9. Sigmund Freud University, Medical School, Barcelona, Spain
10. University of Vermont, Medicine, Burlington, Vermont, United States
11. Restech s.r.l., Milan, Italy