[1] British Columbia Canc Agcy, Michael Smith Genome Sci Ctr, Vancouver, BC V5Z 4E6, Canada
[2] Univ Nebraska Med Ctr, Omaha, NE USA
[3] Univ Wurzburg, Wurzburg, Germany
[4] Univ Arizona, Tucson, AZ USA
[5] Hosp Clin Barcelona, Barcelona, Spain
[6] NCI, Metab Branch, Ctr Canc Res, NIH, Bethesda, MD 20892 USA