Disclaimer: This tool is designed for use by doctors only. The results of the tool alone should never be used to determine a patient's medical treatment. This tool is a statistical model and is not a substitute for an individual treatment plan developed by a doctor with personal knowledge of a specific patient. Other important factors that must be considered include the patient's own medical history, the patient's family medical history and the experience, knowledge, and training of the doctor. Doctors should discuss these results in person with their patients as part of their overall treatment recommendations and should not advise patients to access the tool on their own. Please note that the potential benefits from adjuvant interferon are based on published data from the Eastern Cooperative Oncology Group.