Heavy mobile phone use may be linked to an increased risk of cancer of the salivary gland, a study suggests.

One of the key findings of the study was that heavy users in rural areas had an even higher risk that those in cities, due, the team suggested, to the fact that mobile phones in areas without strong signals need to emit more radiation to work properly.

http://news.bbc.co.uk/2/hi/health/7250372.stm