GENEVA – A major international study into the link between cellphone use and two types of brain cancer has proved inconclusive, according to a report in a medical journal due to be published later this week.The study of almost 13 000 cell phone users found no increase in risk of developing meningioma – a common and frequently benign tumour – and only “suggestions” of increased risk for gliomas – a less common but deadlier form of cancer – from heavy long-term use.The ten-year study, conducted by the World Health Organisation’s International Agency for Research on Cancer, concluded that “biases and error prevent a causal interpretation” directly blaming cellphone radiation for increased risk of glioma. (AP)