[1] Karolinska Inst, Dept Neurosci, Div Cellular & Mol Neurochem, S-17177 Stockholm, Sweden
[2] Univ Ferrara, Dept Expt & Clin Med, Pharmacol Sect, I-44100 Ferrara, Italy
[3] Natl Univ Ireland Univ Coll Dublin, Dept Human Anat & Physiol, Dublin 4, Ireland
[4] Univ Cagliari, Dept Neurosci, Cagliari, Italy
[5] Ctr Rech, Lab L Lafon, Maisons Alfort, France