The pharmaceutical industry is cutting back these days, but you would never know it from the construction underway by Pfizer Inc.

The drug maker broke ground Monday in the Boston area on a new 180,000 square-foot facility that will house researchers being moved from Groton, Conn. In the U.K. earlier this year, the company said it would mostly shutter its operation in Sandwich, the birthplace of Viagra, choosing instead to concentrate research at a new facility in Cambridge, England.

Pharmaceutical companies such as Pfizer are increasingly concentrating research and development in a handful cities known as “bioscience clusters” that are …

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