Horton, S. , la, E. , Mahon, J. , Santelli, J. , Waldfogel, J. , .“Identifying an Essential Package for Adolescent Health: Economic Analysis”. In: Disease Control Priorities (third edition): Volume 8, Child and Adolescent Health and Development, edited by D. Bundy , N. de Silva , S. Horton , D. T. Jamison , G. Patton . Washington, DC: World Bank.