1. Computerized Medical Systems, Inc. URL: http://www.cms-stl.com/company/. Accessed February 18, 2003
2. Varian Medical Systems. URL: http://www.varian.com/onc/prd077.html. Accessed February 7, 2003
3. The University of Chicago, Department of Radiation and Cellular Oncology. URL: http://www.radonc.uchicago.edu/typea/scripts/content.cgi?template=defaults&args=technology, 3dcrt. Accessed February 18, 2003
4. History of ADAC Laboratories. URL: http://www.medical.philips.com/main/company/medical.philips.com/main/company/aboutus/history/adac. Accessed February 10, 2003
5. Hospital Management.net. URL: http://www.hospitalmanagement.net/contractors/imaging/adac/. Accessed February 7, 2003