Autor: |
Prakova GR; Department of Internal Medicine, Medical Faculty, Trakia University, Stara Zagora, Bulgaria ., Gidikova PL; Department of Hygiene, Epidemiology, and Infectious Diseases, Medical Faculty, Trakia University, Stara Zagora, Bulgaria., Sandeva GN; Department of Hygiene, Epidemiology, and Infectious Diseases, Medical Faculty, Trakia University, Stara Zagora, Bulgaria., Haracherova KH; Occupational Medical Service 'Zagora Medical' Ltd, Stara Zagora, Bulgaria., Tacheva TT; Department of Chemistry and Biochemistry, Medical Faculty, Trakia University, Stara Zagora, Bulgaria., Vlaykova TI; Department of Chemistry and Biochemistry, Medical Faculty, Trakia University, Stara Zagora, Bulgaria. |