Steeg, Patricia, Robin Anderson, Menashe Bar-Eli, Ann Chambers, Suzanne Eccles, Kent Hunter, Kazuyuki Itoh, et al. (2009) 2009. “An Open Letter to the FDA and Other Regulatory Agencies: Preclinical Drug Development Must Consider the Impact on Metastasis.”. Clin Cancer Res 15: 4529. doi:10.1158/1078-0432.CCR-09-1363.