A new generation of wearable technology is promising not only to log data about users' health but to predict and avert crises -- from drivers falling asleep at the wheel to runners wearing themselves out in a marathon. But there are concerns over the accuracy of the personal information collected by the burgeoning range of smart wristbands watches and clothing -- and how companies might use that data. Wearable technology is the fastest growing category at this year's Computex Asia's largest tech trade show which kicked off in Taiwan on Tuesday with health-tracking a dominant theme. 'Health and fitness sensors