The search textbox has an autosuggest feature. When you enter three or more characters, a list of up to 10 suggestions will popup under the textbox. Use the arrow keys to move through the suggestions. To select a suggestion, hit the enter key. Using the escape key closes the listbox and puts you back at the textbox. The radio buttons allow you to toggle between having all search items start with or contain the text you entered in the search box.
risk factor (... FAK-ter)
increases the chance of developing a disease. Some examples
of risk factors for cancer are age, a family history of
certain cancers, use of tobacco products, being exposed to
radiation or certain chemicals, infection with certain
viruses or bacteria, and certain genetic