Question: Medco Health Solutions, Inc. was an American Pharmacy Benefits Management (PBM) company which served more than 65 million people, before it was ultimately acquired by Express Scripts, in April of which year?

Context paragraphs:
John O. Agwunobi: John O. Agwunobi, MD, MBA, MPH is a pediatrician and a former US government official and business executive.  His experience includes clinical care, managed care, healthy policy, state and federal public health, retail pharmacy operations and optical service delivery.  He was formerly Senior Vice President of Walmart Stores, Inc. and President of the retailer's $30 billion Health and Wellness business from 2007 to 2014.  At Walmart, Agwunobi was responsible for a chain of 4,000 retail, specialty and mail order pharmacies; more than 2,500 vision centers and 100 in-store convenient care clinics; and a pharmacy benefits management unit.

University of Tennessee Health Science Center: The University of Tennessee Health Science Center (UTHSC) in Memphis includes the Colleges of Health Professions, Dentistry, Graduate Health Sciences, Medicine, Nursing and Pharmacy.  Since 1911, The University of Tennessee Health Science Center has educated nearly 57,000 health care professionals.  As of 2010, "US News and World Report" ranked the College of Pharmacy 17th among American pharmacy schools.  "The mission of the university is to bring the benefits of the health sciences to the achievement and maintenance of human health, with the focus on the citizens of Tennessee and the region, by pursuing an integrated program of education, research, clinical care, and public service."

Catamaran Corporation: Catamaran Corporation (formerly SXC Health Solutions) is a Schaumburg, Illinois based pharmacy benefit management company that sells services related to pharmacy benefit management and medical record keeping to businesses in the United States.  Working independently of the government and insurance companies allows it to operate as a third party verifier; the RxCLAIM online claim processing system allows for prescription drug claims to be processed online if the customer lives in and fills his/her prescription in the United States.  SXC has three separate but interrelated business segments which deal with prescription drug programs.  For 2013 23% of company revenue came from Cigna Corporation.

Tim Wentworth: Timothy C. Wentworth is an American businessman.  He is the CEO and president of pharmacy benefits management company Express Scripts, the United States' largest pharmacy benefit manager.

Diversified Pharmaceutical Services: Diversified Pharmaceutical Services entered the market in 1976 as the pharmacy benefit manager for United HealthCare (now United HealthGroup), a leading national managed care organization.  Diversified pioneered many cost containment strategies that are now core pharmacy benefit manager services and became a recognized leader in clinical programs.  After its acquisition by SmithKline Beecham in 1994, Diversified played a pivotal role in that company's Healthcare Service division.  Express Scripts acquired Diversified April 1, 1999 and consolidated its position as a leading PBM for managed care organizations.

Express Scripts: Express Scripts Holding Company is an American Fortune 100 company.  As of 2017, the company is the 22nd-largest in the United States as well as the largest pharmacy benefit management (PBM) organization in the United States.  Express Scripts had 2016 revenues of $100.752 billion.

Medco Health Solutions: Medco Health Solutions, Inc. was an American Pharmacy Benefits Management (PBM) company which served more than 65 million people, before it was ultimately acquired by Express Scripts in April 2012.  Medco provided pharmacy services for private and public employers, health plans, labor unions, government agencies, and individuals served by Medicare Part D Prescription Drug Plans.  Medco was a member of the S&P 500 and ranked number 34 on the 2011 Fortune 500 list, with 2011 revenues of more than $70 billion.  It earned the No. 1 ranking in the Healthcare: Pharmacy and Other Services category on Fortune magazine’s World’s Most Admired Companies list for five consecutive years (2008-2012).

Liberty Medical: Liberty Medical Supply, Inc. ("Liberty Medical") is a home delivery service that sells diabetes testing supplies, prescription drugs, urology supplies and ostomy supplies directly to consumers.  The company was a subsidiary of Medco Health Solutions, Inc., which purchased Liberty Medical and its parent company, PolyMedica, in 2007.  After Express Scripts acquired Medco, they sold Liberty Medical in December 2012 to members of its management team, and it now operates again as an independent company.  Liberty Medical's corporate headquarters is located in Port St. Lucie, Florida.  The company was one of the city's largest employers with as many as 2,432 employees in 2012.  By the end of 2013, the company headquarters employed as few as 940 employees, adding to the community's jobless rate of over 9%, and implemented 20% pay cuts for all employees.

Sandi Peterson: Sandi Peterson (born 1959) is an American businesswoman and has been group worldwide chairman at Johnson & Johnson since 2012.  She previously held leadership positions at Bayer Medical Care, Medco Health Solutions, Nabisco and Whirlpool Corporation.

George Paz: George Paz is the CEO of Express Scripts, a Fortune 100 company, and the largest pharmacy benefit management (PBM) organization in the US.

Supporting paragraphs: Medco Health Solutions Express Scripts
Answer: 2012