[1] UNIV UPPSALA,DEPT MED PHARMACOL,S-75105 UPPSALA,SWEDEN
[2] UNIV AGR SCI,DEPT PHYSIOL,UPPSALA,SWEDEN
[3] GOTENBURG UNIV,INST NEUROBIOL,S-41124 GOTHENBURG,SWEDEN
[4] UNIV TEXAS,DEPT PHARMACOL,DALLAS,TX 75230
[5] UNIV TEXAS,DEPT INTERNAL MED,DALLAS,TX 75230
[6] KAROLINSKA INST,DEPT PHARMACOL,S-10401 STOCKHOLM 60,SWEDEN
[7] SAHLGRENS HOSP,DEPT SURG 3,S-41345 GOTHENBURG,SWEDEN