American Cancer Society
http://www.cancer.org/
BMT Infonet
http://www.bmtinfonet.org/
Global Cancer Control Community
http://www.uicc-community.org/
CancerBACUP
http://www.cancerbacup.org.uk/
International Psycho-Oncology Society
http://www.ipos-society.org/
International Union Against Cancer
http://www.uicc.org/
Lance Armstrong Foundation
http://www.livestrong.org/
Memorial Sloan Kettering Cancer Centre http://www.mskcc.org/
National Cancer Institute
http://www.cancer.gov/
University of Pennsylvania
http://www.oncolink.upenn.edu/
The University of Iowa Hardin Meta Directory
www.lib.uiowa.edu/hardin/md/index.html