http://www.nature.com/nature/journal.../266724a0.html
http://www.pubmedcentral.nih.gov/art...2434&tools=bot
It may very well be dangerous, but everything is dangerous. Cell phones may cause cancer, magnetic field may cause cancer, starlight may cause cancer, vaccines may cause cancer, viruses may cause cancer, mouthwash might cause cancer, and yes, even Willravel might cause cancer.