The January 3 issue of the New England Journal of Medicine "includes the first article in a series of review articles on global health," Harvey Fineberg of the Institute of Medicine and David Hunter of the Harvard School of Public Health write in an NEJM editorial. "The series is built around articles that explain the need for global health, the challenges to achieving it, and the solutions to problems related to it," they add. They discuss how "the meaning of the term global health has evolved over time," and say, "In developing this series, we adopted the concept of global health as 'public health for the world,'" which "condenses the definition offered by the Institute of Medicine's Expert Committee on the U.S. Commitment to Global Health in 2008."