1 Arthritis Unit, Rheumatology Department, Hospital Clinic of Barcelona, Barcelona, Spain. Electronic address: castellanos@clinic.cat.
2 Arthritis Unit, Rheumatology Department, Hospital Clinic of Barcelona, Barcelona, Spain.
3 Respiratory Institute, Pneumology Department, Hospital Clinic of Barcelona, Barcelona, Spain.
4 Unit of Synthesis and Biomedical Applications of Peptides, Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), Consejo Superior de Investigaciones Científicas, Barcelona, Spain.