Authors
Zornitsa V. Gorcheva
Department of Nursing Care, Medical University, Pleven, Bulgaria
Galya Ts. Stavreva
Department of Pharmacology and Toxicology, Medical University, Pleven, Bulgaria
Negrin N. Negrev
Medical University “Prof. Paraskev Stoyanov”, Varna, Bulgaria
Radomir G. Radomirov
Institute of Neurobiology, Bulgarian Academy of Sciences, Sofia, Bulgaria