1. Americans Going Online…Explosive growth, uncertain destinations. Available at: https://www.pewresearch.org/politics/1995/10/16/americans-going-online-explosive-growth-uncertain-destinations/. Published 1995. Accessed March 19, 2021.
2. Wells J, Lewis L. Internet access in U.S. public schools and classrooms: 1994-2005 (NCES 2007-020). In: Education USDo, ed. Washington, D.C.: National Center for Education Statistics; 2006.
3. Construction of a surrogate variable for impotence in the Massachusetts Male Aging Study;Feldman;J Clin Epidemiol,1994
4. Epidemiological approaches to heart disease: the framingham study;Dawber;Am J Public Health Nations Health,1951
5. The nurses' health study;Belanger;Am J Nurs,1978