**Author details**

Neli Ermenlieva1 \*, Gabriela Tsankova1 , Darina Naydenova1 , Tatina T. Todorova1 , Dayana Tsankova1 and Emilia Georgieva<sup>2</sup>

\*Address all correspondence to: n.ermenlieva@abv.bg

1 Department of Preclinical and Clinical Sciences, Faculty of Pharmacy, Medical University Varna, Varna, Bulgaria

2 Medical College, Medical University Varna, Bulgaria
