1. Laboratory for Molecular Pharmacology, Department of Neuroscience and Pharmacology (K.L.E., B.H., P.S.P., T.W.S.), DK-2200 Copenhagen N, Denmark
2. Department of Biomedical Sciences (J.B.H.), University of Copenhagen, DK-2200 Copenhagen N, Denmark
3. Department of Neuroscience (J.M., T.H.), Karolinska Institutet, 171 77 Stockholm, Sweden
4. 7TM Pharma A/S (T.W.S.), DK-2790 Hoersholm, Denmark