Something to think about tonight, in bed, alone. A Swedish study has found that users of early mobile phones face an 80 percent greater chance of developing brain tumors than those who did not use them. Granted, the phones in question ran on something called the Analog Nordic Mobile Telephone standard, popular in northern Europe, Russia and the Baltics. But the system is still in place in 40 countries. So let’s hope on that trip to Norway last summer you didn’t borrow your pal’s handset for a quick call to mom. By the way, is that your head pounding, or mine?