Over the past three years the number of partnerships being inked between drug developers and diagnostics companies has soared, according to PricewaterhouseCoopers. And that's just the latest sign that diagnostic tests are playing an ever-increasing role in identifying patients most likely to benefit from a new treatment--which is especially true for expensive cancer drugs. Chalk it all up to the personalized medicine trend in biopharma, reports the Financial Times, as payers and regulators look for more drugs that have a higher chance of success. Article