1. US Department of Health and Human Services. About HHS. Availabe at: http://www.hhs.gov/about/.Published. Accessed July 25, 2009.
2. Plagues and politics;Mullan,1989
3. Public Health Service;Parascandola,1998
4. US Public Health Service Nursing. Chief nurse officer history. Available at: http://phs-nurse.org/chief-nurse/72-chief-nurse-history.html. Accessed July 25, 2009.
5. US Department of Health and Human Services. Commissioned corps response teams: a thumbnail sketch. Available at: http://ccrf.hhs.gov/ccrf/Response_Team_Description.htm.Published. Accessed July 26, 2009.