Mitchell D. Schnall, MD, PhD Network Chair Department of Radiology Hospital of the University of Pennsylvania 3400 Spruce Street Philadelphia, PA 19104 Phone: 215-662-7238 Fax: 215-662-3013 E-mail: mitchell.schnall@uphs.upenn.edu	Constantine Gatsonis, PhD Director Center for Statistical Sciences Brown University, Box G-121-7 121 South Main Street, 7th Floor Providence, RI 02912 Phone: 401-863-9183 Fax: 401-863-9182 E-mail: gatsonis@stat.brown.edu
Denise R. Aberle, MD Network Deputy Co-Chair University of California Los Angeles 12 Department of Radiological Sciences David Geffen School of Medicine at UCLA 924 Westwood Boulevard, Suite 420 Los Angeles, CA 90024 Phone: 310-794-8996 Fax: 310-794-3539 E-mail: daberle@mednet.ucla.edu	Barry Siegel, MD Network Deputy Co-Chair Mallinckrodt Institute of Radiology Washington University School of Medicine 510 S. Kingshighway Blvd. St. Louis, MO  63110 Phone:  314-362-2809 Fax: 314-362-2806 E-mail: siegelb@mir.wustl.edu
Steven R. King, MS, FACHE Assistant Executive Director ACR CRC Philadelphia Office American College of Radiology 1818 Market Street, Suite 1600 Philadelphia, PA 19103 Phone: 215-574-3218 Fax: 215-922-8801 E-mail: sking@acr.org	Charles K. Apgar, MBA Senior Director, ACRIN American College of Radiology 1818 Market Street, Suite 1600 Philadelphia, PA 19103 Phone: 215-574-3231 Fax: 215-717-0936 E-mail: capgar@acr.org