1. Woodwell DA, Cherry DK. National Ambulatory Medical Care Survey: 2002 summary. Advance data from Vital and Health Statistics. No. 346 (Aug 26, 2004). CDC. Available at: http://www.cdc.gov/nchs/data/ad/ad346.pdf. Accessed November 23, 2004.
2. Concepts and controversies in cancer screening;Gates;Am J Cancer,2003
3. Screening for cervical cancer. Guide to clinical preventive services;US Preventive Services Task Force,1996
4. Enthusiasm for cancer screening in the US;Schwartz;JAMA,2004
5. Controversies in prostate cancer screening: analogies to the early lung cancer screening debate;Collins;JAMA,1996