Authors
D. Kalinova
Clinic of Rheumatology, UMHAT “Sv. Ivan Rilski”, Medical University – Sofia, Bulgaria
A. Vinkov
Hôpitaux Drôme Nord, Romans-sur-Isère, France
Z. Kolarov
Clinic of Rheumatology, UMHAT “Sv. Ivan Rilski”, Medical University – Sofia, Bulgaria
Department of Dermatology and Venereology, Medical University – Sofia, Bulgaria