The frequently contradicting studies on cellphones producing cancer leaned against such a verdict late Thursday after the publication of a Danish study. A very large 358,403-person, 18-year Institute of Cancer Epidemiology project in the British Medical Journal showed 356 instances of gilomas (brain cancer variants) and 846 central nervous system cancers, the same ratio as for those who didn't have a cellphone at all. Not all users had the the same use, but even those who had a cellphone for a long time, up to 13 years, showed no increased rate.