[1
] Clinic of Endocrinology, Alexandrovska University Hospital, Medical University-Sofia,
Sofia, Bulgaria;
[2
] Central Clinical Laboratory, Alexandrovska University Hospital, Medical University-Sofia,
Sofia, Bulgaria;
[3
] Laboratory of Tumor Immunology and Immunotherapy, Hyogo College of Medicine, Hyogo,
Japan;
[4
] Laboratory of Host Defense, Hyogo College of Medicine, Hyogo, Japan