[1] UNIV ERLANGEN NURNBERG, INST KLIN & MOLEK VIROL, D-91054 ERLANGEN, GERMANY
[2] UNIV LUBECK, INST IMMUNOL & TRANSFUS MED, D-23562 LUBECK, GERMANY
[3] BIOTEST AG, RES DEPT, D-63303 DREIEICH, GERMANY
[4] UNIV TUBINGEN, INST HYG, VIROL ABT, D-72076 TUBINGEN, GERMANY
[5] UNIV BERN, INST MED MIKROBIOL, CH-3010 BERN, SWITZERLAND
[6] UNIV GRONINGEN, DEPT CLIN IMMUNOL, 9700 AB GRONINGEN, NETHERLANDS
[7] UNIV GRONINGEN, RENAL TRANSPLANTAT UNIT, 9700 AB GRONINGEN, NETHERLANDS