Dr Kevin Tracey, pioneer and inventor of these methods, gave a fascinating TED talk on this topic not so long ago. If you have 15 min to spare, give it a watch.

Dr Kevin Tracey, pioneer and inventor of these methods, gave a fascinating TED talk on this topic not so long ago. If you have 15 min to spare, give it a watch... it's amazing: http://www.tedmed.com/talks/show?id=526203 http://www.tedmed.com/talks/show?id=526203