Mobile phone use and risk of parotid gland tumor

Handheld mobile phones were introduced in Denmark and Sweden during the late 1980s. This makes the Danish and Swedish populations suitable for a study aimed at testing the hypothesis that long-term mobile phone use increases the risk of parotid gland tumors. In this population-based case-control study, the authors identified all cases aged 20–69 years diagnosed with parotid gland tumor during 2000–2002 in Denmark and certain parts of Sweden.