[1] HUDDINGE HOSP,DEPT CLIN PHYSIOL,S-14186 HUDDINGE,SWEDEN
[2] SOUTH HOSP,DEPT MED,STOCKHOLM,SWEDEN
[3] SOUTH HOSP,DEPT ANESTHESIA,STOCKHOLM,SWEDEN
[4] SOUTH HOSP,DEPT HOSP PHYS,STOCKHOLM,SWEDEN
[5] SOUTH HOSP,DEPT ROENTGENOL,STOCKHOLM,SWEDEN
[6] KAROLINSKA HOSP,DEPT ANESTHESIA,S-10401 STOCKHOLM 60,SWEDEN