There is a Dr. Clark listed in Quackwatch.
http://www.quackwatch.org/search/webglimpse.cgi?ID=1&query=Dr.+Clark
This will give you more information. he is under FTC indictment.

There are many charlatans, snake oil salesmen and quacks out there - beware!

Gary Allsebrook
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Dx 11/22/02, SCC, 6 x 3 cm Polypoid tumor, rt tonsil, Stage III/IVA, T3N0M0 G1/2
Tx 1/28/03 - 3/19/03, Cisplatin ct x2, IMRT, bilateral, with boost, x35(69.96Gy)
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"You are a mist that appears for a little while and then vanishes" (James 4:14 NIV)