I believe that anyone who can think is biased.  We are a product of our experiences and that makes us all biased.  I am very biased against people who manage warfarin stopping it for very long periods of time (like a week for having teeth cleaned) and causing people to to have strokes and never live independently again.

Other than that, I have put the names of the companies I have done consulting work, given talks for etc on my home page so you can see who has paid me.  How many other websites can you find that have done that?