[1] KAROLINSKA INST,DEPT VIROL,S-10401 STOCKHOLM 60,SWEDEN
[2] ROSLAGSTULL HOSP,DEPT INFECT DIS,STOCKHOLM,SWEDEN
[3] KAROLINSKA HOSP,DEPT INTERNAL MED,S-10401 STOCKHOLM 60,SWEDEN
[4] SAHLGRENS HOSP,DEPT DERMATOL & VENEROL,S-41345 GOTHENBURG,SWEDEN
[5] DANDERYD HOSP,DEPT INFECT DIS,S-18288 DANDERYD,SWEDEN
[6] KAROLINSKA HOSP,DEPT DERMATOL & VENEROL,S-10401 STOCKHOLM 60,SWEDEN