[1] NEW YORK BLOOD CTR, BLOOD DERIVAT PROGRAM, NEW YORK, NY 10021 USA
[2] NETHERLANDS RED CROSS, BLOOD TRANSFUS SERV, CENT LAB, AMSTERDAM, NETHERLANDS
[3] NHLBI, BETHESDA, MD 20892 USA
[4] INST PASTEUR, F-75724 PARIS 15, FRANCE
[5] DUKE UNIV, MED CTR, DURHAM, NC 27710 USA
[6] SW FDN BIOMED RES, SAN ANTONIO, TX 78284 USA