Founded in 1901, Walgreens Co. is one of the leading drugstore chains in the United States. Located in Naples, Fla., the pharmacy specializes in providing health plans and health care solutions. In addition to providing infusion and respiratory therapy, the company offers HIV/AIDS, infusion, respiratory and home medical equipment services. The Fortune magazine has listed Walgreens Co. among the World's Most Admired Companies. It operates more than 7,650 drugstores in the United States, District of Columbia and Puerto Rico.