CLEMENTON, N.J.--(BUSINESS WIRE)--CRI Worldwide, Inc., a leading provider of clinical research services to the global pharmaceutical and biotech industry, has announced the opening of its Center for the Research of Pain Disorders, based at the company’s state-of-the-art clinical research facility at the Kirkbride Center in Philadelphia. The Center for the Research of Pain Disorders will be led by Daniel Gruener, MD, a recognized expert in the areas of analgesic and neuropathic pain research.