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R. Dimitrova
Second Department of Internal Diseases, Clinic of Endocrinology and Metabolic Diseases,
“Sv. Marina” University Hospital, Faculty of Medicine, Medical University of Varna –Bulgaria
K. Hristozov
Second Department of Internal Diseases, Clinic of Endocrinology and Metabolic Diseases,
“Sv. Marina” University Hospital, Faculty of Medicine, Medical University of Varna –Bulgaria