Affiliation: | (1) Chiron Corporation, 4560 Horton Street, 94608 Emeryville, California;(2) Molecular Medicine Group, MRC, Clinical Research Centre, HAI 3UJ Harrow, Middlesex, UK;(3) Department of Human Genetics, Roswell Park Memorial Institute, New York State Department of Health, 666 Elm Street, 14263 Buffalo, New York |