Jerry D. Leaf (April 4, 1941 - July 10, 1991) was Vice President of the cryonics organization Alcor Life Extension Foundation, and President of the cryonics service firm Cryovita, Inc., until his cryopreservation by Alcor following a fatal heart attack in 1991. He also worked as a cardiothoracic surgery researcher at the UCLA School of Medicine, co-authoring more than 20 papers from the laboratory of Dr. Gerald Buckberg. Wikipedia
The definitive Wikipedia entry for Jerry Leaf. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Jerry_Leaf
Nevertheless, we, the editors of CRYONICS feel justified in saying that Jerry Leaf is arguably the most important man in cryonics since Robert Ettinger. www.alcor.org/Library/html/Interview-JerryLeaf.html