Twelve studies (940 patients) reported that Chinese herbal medicines reduced the risk of death at 12 months by roughly one-third.

The challenge now is if technology can jump over the bar the dogs have set.

What is it dogs are smelling, and can chemical analysis match the dogs in terms of specificity and sensitivity? Then the pathway will likely lead to an ?electronic nose.

This is not the final word.

Our study provides compelling evidence that cancers hidden beneath the skin can be detected simply by [dogs] examining the odors of a person's breath.

Yes, we were astounded, as well. And that's why it needs to be replicated with other dogs, plus chemical analysis of what's in the breath.

Our dog sat down at a dog show at a time when the dog was supposed to stand up. That person went to her doctor and learned she had a melanoma.

We hope that our study will stimulate continued interest in researching the potential benefits of combining Chinese herbal therapy with conventional therapies for people with cancer.

We actually don't know what the dogs are smelling. But we do know that cancers have breakdown products - cocktails of compounds - and these smell different to a dog than normal cells.