[1] UNIV TUBINGEN,EUCAMBIS CENT FAC,MED & NAT SCI RES CTR MNF,D-72076 TUBINGEN,GERMANY
[2] IST RICERCA CODIVILLO PUTTI,LAB IMMUNOL & GENET,I-40136 BOLOGNA,ITALY
[3] UNIV CATTOLICA SACRO CUORE,IST MED INTERNA & GERIATRIA,CLIN IMMUNOL LAB,I-00168 ROME,ITALY
[4] FLINDERS MED CTR,BEDFORD PK,SA 5042,AUSTRALIA
[5] FREE UNIV AMSTERDAM,SECT GERIATRICS,NL-1007 MB AMSTERDAM,NETHERLANDS
[6] LEIDEN UNIV,SECT GERONTOL,NL-2300 RC LEIDEN,NETHERLANDS
[7] UNIV SUSSEX,CELL & MOL BIOL LAB,BRIGHTON BN1 9QG,E SUSSEX,ENGLAND
[8] HOSP REINA SOFIA,FAC MED,DEPT INMUNOL,E-14004 CORDOBA,SPAIN
[9] ST MARYS HOSP,IMMUNOGENET LAB,MANCHESTER M13 0JH,LANCS,ENGLAND
[10] UNIV ULSTER,CANC & AGEING RES GRP,SCH BIOMED SCI,COLERAINE BT52 1SA,LONDONDERRY,NORTH IRELAND
[11] UNIV TUBINGEN,DEPT INTERNAL MED 2,SECT TRANSPLANTAT IMMUNOL & IMMUNOHAEMATOL,SCH MED,D-72076 TUBINGEN,GERMANY