1. NIH launches PubMed Central;Vastag;J Natl Cancer Inst,2000
2. YouTube as source of prostate cancer information;Steinberg;Urology,2010
3. Merriam-Webster’s Collegiate Dictionary, ed. 11. Springfield, MA: Merriam-Webster; 2003.
4. Cambridge Advanced Learner’s Dictionary, ed. 3. Cambridge, UK: Cambridge University Press; 2008.
5. Dictionary of cancer terms. National Cancer Institute Web site. http://www.cancer.gov/dictionary/. Accessed April 13, 2010.