Authors
Regina S. Komsa-Penkova
Division of Biochemistry, Medical University – Pleven, Bulgaria
Georgi M. Golemanov
Division of Biochemistry, Medical University – Pleven, Bulgaria
Zdravka V. Radionova
Division of Pedagogy and Psychology, Medical University – Pleven, Bulgaria
Pencho T. Tonchev
Department of Propedeutics of Surgical Diseases, Medical University – Pleven, Bulgaria
Sergej D. Iliev
Department of Propedeutics of Surgical Diseases, Medical University – Pleven, Bulgaria
Veselin V. Penkov
Bulgaria