1. From the Mayo Clinic Rochester, MN; Roswell Park Cancer Institute, Buffalo, NY; Mayo Clinic, Phoenix, AZ; Toronto Sunnybrook Regional Cancer Centre, Toronto, Ontario, Canada; University of Chicago, Chicago, IL; The University of Texas M. D. Anderson Cancer Center, Houston, TX; Quest Diagnostics Nichols Institute, San Juan Capistrano, CA; and MGI Pharma, Bloomington, MN.