Mobiles and tumors

I thought this correlation was rubbished years ago. The study says that the "risk of developing a parotid gland tumour is nearly 50% higher for frequent mobile phone users -- more than 22 hours a month." Though such tumors are non-cancerous and only lead to an increase in size of the gland, some could be cancerous.

I am sure most of us spend more than a day a month talking on the cell. And then we just started a few years back. How about the next generations who use the cell right from high school? Those whose livelihood depends upon these cellphones? A 50% higher risk could translate into a real big number. So are my days numbered?