[1] UNIV HELSINKI,DEPT MED GENET,POB 21,SF-00014 HELSINKI,FINLAND
[2] UNIV HELSINKI,DEPT MED SCI,SF-00310 HELSINKI,FINLAND
[3] FINNISH RED CROSS & BLOOD TRANSFUS SERV,BLOOD TRANSFUS SERV,SF-00310 HELSINKI,FINLAND
[4] JYVASKYLA CENT HOSP,DEPT SURG,SF-40620 JYVASKYLA,FINLAND
[5] UNIV HELSINKI,CENT HOSP,DEPT SURG 2,SF-00290 HELSINKI 29,FINLAND
[6] MEM UNIV NEWFOUNDLAND,FAC MED,ST JOHNS A1B 3V6,NEWFOUNDLAND,CANADA
[7] UNIV AUCKLAND,SCH MED,DEPT PATHOL,AUCKLAND,NEW ZEALAND
[8] MARSHFIELD MED RES FDN,MARSHFIELD,WI 54449
[9] JOHNS HOPKINS UNIV,SCH MED,DEPT ONCOL,BALTIMORE,MD 21205
[10] JOHNS HOPKINS UNIV,SCH MED,DEPT PATHOL,BALTIMORE,MD 21205
[11] JOHNS HOPKINS UNIV,SCH MED,DEPT EPIDEMIOL,BALTIMORE,MD 21205
[12] JOHNS HOPKINS UNIV,SCH PUBL HLTH & HYG,BALTIMORE,MD 21218
[13] JOHNS HOPKINS UNIV HOSP,BALTIMORE,MD 21231