Here is an independent published review of the Vizilite system.

http://oralcancernews.org/wp/effica...in-the-identification-of-oral-lesions-2/

As to knowing a lot about all this, you try being obsessive/compulsive (my wife's terms) about something for more than a decade, 7 days a week, while having the privilege to speak at symposiums every month with the best and the brightest in the field, who you get to absorb from, and you'll know a lot too. You'll get used to thinking you are passionate, your mate thinking you are compulsive, and the shrink that has been following you since your survival, calling your behavior pathological.