A study of 12,000 mobile phone users in Sweden and Norway found "a statistically significant association between calling time/number of calls per day and the prevalence of warmth behind/around or on the ear, headaches and fatigue". The mobile phone users studied used their phone less than two minutes or two calls per day.

The researchers also found dose/response relationships with concentration, memory loss, fatigue and headache for people who used the phones for over an hour per day in total.

Original research: Mild et al. National Institute for Working Life, included as evidence in the Third Report - Scientific Advisory System: Mobile Phones & Health, which can be accessed on the House of Commons website: www.parliament.uk (look under Select Committees).

For more information on exposure to electromagnetic radiation visit: www.powerwatch.org.uk