Q, Name the world's largest central laboratory network.
A. That's easy! It's Covance. Here is the company's description of itself from it's own web home page (emphasis mine):
We provide a portfolio of preclinical and clinical development and commercial service offerings — delivered through industry-leading nonclinical testing services, the world's largest central laboratory network, and a global team of clinical trial professionals and cardiac safety experts.Read Complete story: http://labsoftnews.typepad.com/lab_soft_news/2006/02/worlds_largest_.html