Cummins Sharon E, Hebert Kiandra K, Anderson Christopher M, Mills Judith A, Zhu Shu-Hong
Cancer Center, University of California, San Diego, La Jolla, CA 92093-0905, USA.
Am J Public Health. 2007 Aug;97(8):1402-5. doi: 10.2105/AJPH.2006.101741. Epub 2007 Jun 28.