NCI's Web site, www.cancer.gov, contains comprehensive information about cancer causes and prevention, screening and diagnosis, treatment and survivorship; clinical trials; statistics; funding, training and employment opportunities; and the institute and its programs. You can also get cancer information online through the LiveHelp instant messaging service at https://cissecure.nci.nih.gov/livehelp/welcome.asp. If you live in the United States, you may call the NCI's Cancer Information Service toll-free at 1-800-4-CANCER (1-800-422-6237) for cancer information in English and Spanish. For deaf and hard of hearing callers, the TTY number is 1-800-332-8615.