1. Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy; University of Helsinki; Viikinkaari 5 E (P.O. Box 56), FI- 00014 Helsinki Finland
2. Health Sciences Research Centre; University of Beira Interior (CICS-UBI); Av. Infante D. Henrique 6200-506 Covilhã Portugal
3. Faculty of Natural Sciences, Institute of Chemistry, Inorganic Chemistry; Technische Universität Chemnitz; 09107 Chemnitz Germany
4. Centre for Neuroscience and Cell Biology (CNC); 3004-504 Coimbra Portugal
5. Strathclyde Institute of Pharmacy and Biomedical Sciences; University of Strathclyde; 161 Cathedral Street Glasgow G4 0RE UK