1. European Institute for Peptide Research (IFRMP 23), Laboratory of Cellular and Molecular Neuroendocrinology, Institut National de la Santé et de la Recherche Médicale (INSERM U 413), Unité Affiliée au Centre National de la Recherche Scientifique (UA CNRS), University of Rouen (L.G., M.L., M.G., M.C.T., H.V.), 76821 Mont-Saint-Aignan, France
2. Department of Cellular Animal Physiology, Nijmegen Institute for Neurosciences, University of Nijmegen (E.W.R.), Toernooiveld 1, 6525 ED, Nijmegen, The Netherlands