[1] Bayer Healthcare, Tarrytown, NY USA
[2] NW Prostate Inst, Seattle, WA USA
[3] Hosp Clin Barcelona, Barcelona, Spain
[4] Univ Aberdeen, Aberdeen, Scotland
[5] Univ Texas, MD Anderson Canc Ctr, Houston, TX 77030 USA
[6] Immunicon Corp, Huntingdon Valley, PA USA
[7] Johns Hopkins Univ, Baltimore, MD USA