1. Institute of Pharmacology, Polish Academy of Sciences, Department of Pain Pharmacology, 31-343 Krakow, Poland
2. Research
Group of Organic Chemistry, Vrije Universiteit Brussel, Brussels 1050, Belgium
3. Department
of Chemical Biology and Peptide Research, Clinical Research Institute of Montreal, Montreal, QC H2W
1R7, Canada
4. Department
of Pharmacology, College of Medicine, University of Arizona, Tucson, Arizona 85724, United States
5. Animal
Physiology and Neurobiology, Zoological Institute, Katholieke Universiteit Leuven, 3000 Leuven, Belgium
6. Department
of Pharmacy, “G. d’Annunzio” University, 66100 Chieti, Italy