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Walgreen Co. commonly abbreviated as WAGS, doing business as Walgreens, is the largest drug retailing chain in the United States of America. As of January 31, 2012, the company operates 8,300 locations across all 50 states, the District of Columbia and Puerto Rico. Founded in Chicago, Illinois in 1901, it has since expanded throughout the United States. Walgreens is currently headquartered in the nearby suburb of Deerfield, Illinois.
Walgreens provides access to consumer goods and services and pharmacy, health and wellness services in America through its retail drugstores, Walgreens Health Services division and Walgreens Health and Wellness division. Walgreens Health Services offers pharmacy patients and prescription drug and medical plans through Walgreens Mail Service Inc., Walgreens Home Care Inc., Walgreens Specialty Pharmacy LLC and SeniorMed LLC. Walgreens Health and Wellness division includes Take Care Health Systems. Walgreens has 7,733 drugstores as of June 30, 2011.