1. Clinic of Pulmonary Diseases and Allergy and Clinic of Preventive Cardiology and Vascular Medicine, University Medical Center Ljubljana, Ljubljana, Slovenia.
2. Clinic of Pulmonary Diseases and Allergy, University Medical Center Ljubljana, Ljubljana, Slovenia.
3. Health Resort Radenci, Radenci, Slovenia.
4. Clinic of Preventive Cardiology and Vascular Medicine, University Medical Center Ljubljana, Ljubljana, Slovenia.