[1] KAROLINSKA INST,DEPT PHARMACOL,BOX 60400,S-10401 STOCKHOLM 60,SWEDEN
[2] KAROLINSKA HOSP,DEPT CLIN PHYSIOL,S-10401 STOCKHOLM 60,SWEDEN
[3] KAROLINSKA HOSP,DEPT CLIN PHARMACOL,S-10401 STOCKHOLM 60,SWEDEN
[4] HUDDINGE UNIV HOSP,DEPT MED,S-14186 HUDDINGE,SWEDEN