1. Department of Biomolecular Chemistry Faculty of Medicine Medical University of Lodz Mazowiecka 6/8 92-215 Lodz Poland
2. Department of Neuropeptides Mossakowski Medical Research Centre Polish Academy of Sciences Pawińskiego 5 02-106 Warsaw Poland
3. Faculty of Chemistry University of Wroclaw F. Joliot-Curie 14 50-383 Wroclaw Poland