[1] UNIV CALIF SAN FRANCISCO, DEPT PSYCHIAT, NEUROGENET LAB, SAN FRANCISCO, CA 94143 USA
[2] HARVARD UNIV, BETH ISRAEL HOSP, SCH MED, NEUROGENET LAB, BOSTON, MA 02115 USA
[3] YALE UNIV, SCH MED, DEPT NEUROBIOL, NEW HAVEN, CT 06510 USA
[4] UNIV EDINBURGH, SCH MED, DEPT PHYSIOL, EDINBURGH EH8 9AG, MIDLOTHIAN, SCOTLAND
[5] INSERM U371, F-69500 BRON, FRANCE
[6] UNIV OXFORD, DEPT PHYSIOL, OXFORD OX1 3PT, ENGLAND