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About The Authors

Svetla Staykova
Medical University of Varna
Bulgaria

Second Departmentof Internal diseases, Faculty of Medicine;

Clinic of  Nephrology and Dialysis, St. Marina University Hospital

Petar Petrov
Medical University of Varna

Second Departmentof Internal diseases, Faculty of Medicine;

Clinic of  Nephrology and Dialysis, St. Marina University Hospital

Lili Grudeva
Medical University of Varna

Clinic of  Hepatogastroenterology, St. Marina University Hospital

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