Affiliation: | a Laboratory of Retrovirology, Division of Infectious Diseases, Department of Medicine, Warren Alpert Medical School of Brown University, Providence, RI 02903, USA b Division of Hematology and Oncology, Department of Medicine, Warren Alpert Medical School of Brown University, Providence, RI 02903, USA c Bioinformatics and Pattern Discovery Group, IBM Thomas J. Watson Research Center, Yorktown Heights, P.O. Box 218, NY 10598, USA |