[1] INT AGCY RES CANC,150 COURS ALBERT THOMAS,F-69372 LYONS 08,FRANCE
[2] INST GUSTAVE ROUSSY,IMMUNOBIOL TUMEURS LAB,CNRS,UA 1156,F-94805 VILLEJUIF,FRANCE
[3] CHINESE UNIV HONG KONG,PRINCE WALES HOSP,FAC MED,DEPT MORBID ANAT,SHA TIN,HONG KONG
[4] UNIV FREIBURG,ZENTRUM HYG,INST VIROL,D-7800 FREIBURG,FED REP GER
[5] CHU GRENOBLE,VIROL LAB,F-38043 GRENOBLE,FRANCE