Authors
R. Gancheva
Clinic of Rheumatology, University Hospital Sv. Iv. Rilski – Sofia, Bulgaria
T. Kundurzhiev
Faculty of Public Health, Medical University – Sofia, Bulgaria
Zl. Kolarov
Clinic of Rheumatology, University Hospital Sv. Iv. Rilski – Sofia, Bulgaria
A. Koundurdjiev
Clinic of Nephrology, University Hospital Sv. Iv. Rilski, Medical University – Sofia, Bulgaria
