**Author details**

Mariana Petrova Genova1,2\*, Bisera Dimitrova Atanasova1,2 and Katya Nikolova Todorova-Ananieva<sup>3</sup>

\*Address all correspondence to: mariana8sofia@yahoo.com

1 Department of Clinical laboratory and Clinical immunology, Medical Faculty, Medical University, Sofia, Bulgaria

2 Clinical Laboratory and Clinical Pharmacology, University Hospital "Alexandrovska", Sofia, Bulgaria

3 University Clinic of Endocrinology, Medical University, Pleven, Bulgaria
