[1] Royal Free & Unvi Coll Med Sch Sch, Auton Neurosci Inst, London NW3 2PF, England
[2] Univ Milan, Dept Pharmacol Sci, I-20133 Milan, Italy
[3] Free Univ Brussels, IRIBHM, B-1070 Brussels, Belgium
[4] Free Univ Brussels, Erasme Hosp, Dept Med Chem, B-1070 Brussels, Belgium
[5] Univ Cambridge, Dept Pharmacol, Cambridge CB2 1PD, England
[6] Inspire Pharmaceut Inc, Mol Pharmacol, Durham, NC 27703 USA
[7] Univ Strathclyde, Dept Physiol & Pharmacol, Glasgow G4 0NR, Lanark, Scotland
[8] Univ Complutense Madrid, Dept Bioquim, E-28040 Madrid, Spain
[9] EFS Alsace, INSERM, U311, F-67065 Strasbourg, France
[10] NIDDK, Bioorgan Chem Lab, Bethesda, MD 20892 USA
[11] Univ Missouri, Dept Biochem, Columbia, MO 65212 USA