Professor Krzysztof Józwiak is head of laboratory of medicinal chemistry and neuroengineering of Medical University of Lublin, Poland Dr W John Lough is reader in pharmaceutical analysis in the Department of Pharmacy, Health and Well-Being at the University of Sunderland, UK Irving W. Wainer, Ph.D. is senior investigator, in the Bioanalytical Chemistry and Drug Discovery Section, Laboratory for Clinical Investigation, National Institute of Aging/National Institutes of Health