M. Michael Wolfe, a gastroenterologist at Boston University, admits he was duped by the Pharmacia Corporation, the manufacturer of the blockbuster arthritis drug Celebrex. (In 2003, the company was purchased by Pfizer.) In the summer of 2000, The Journal of the American Medical Association asked Wolfe to write a review of a study showing that Celebrex was associated with lower rates of stomach and intestinal ulcers and other complications than two older arthritis medications, diclofenac and ibuprofen. Wolfe found the study, tracking 8,000 patients over a six-month period, persuasive, and penned a favorable review, which helped to drive up Celebrex sales.