Note the word play used in this summary.

Information about using the illustrations in this summary, along with many other cancer-related images, is available in Visuals Online, a collection of over 2,000 scientific images.

In most instances, the generic term "laetrile" will be used in this summary; however, a distinction will be made between the products when necessary.

Many of the medical and scientific terms used in this summary are found in the NCI Dictionary of Genetics Terms.

The versions used in this summary, as well as others, can be found in al-Tabari's Prophets and Patriarchs and Reuven Firestone's Journeys in Holy Lands.

Many of the medical and scientific terms used in this summary are hypertext linked (at first use in each section) to the NCI Dictionary of Cancer Terms, which is oriented toward nonexperts.