Summary: New research suggesting that the ban on smoking in public places has led to a sharp fall in the number of children admitted to hospital with asthma. Sunbeds and cancer, Dr Mark Porter examines claims by some tanning salons that their machines do not increase the risk of developing skin cancer despite UV tanning devices being classified as carcinogenic to humans. Plus we visit a leading expert to answer a listener's query about why she is waking up with a very dry mouth. And why your body mass index may not be the best way to work out if you are overweight.
