?:authorAffiliation
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[\'Clinic of Rheumatology, University Hospital \'St. Ivan Rilski\', Medical University of Sofia, 13 Urvich str, 1612, Sofia, Bulgaria. Vladimira.boyadzhieva@gmail.com.\', \'Clinic of Rheumatology, University Hospital \'St. Ivan Rilski\', Medical University of Sofia, 13 Urvich str, 1612, Sofia, Bulgaria.\']
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