Where can I find comparisons of teeth whitening products & their effectiveness? Any ideas?

Hello. I'm looking for valid results that compare various teeth whitening products & procedures. Thanks for your help! BJB www.whiteteethanswers.com
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Maybe this will help- http://teethwhiteningreviews.com/reviews… Or this- http://www.dentist.net/toothwhitening.as… JAMRDH - dental hygienist
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