1. Public Health Service Act Section 351, 1944.
2. Code of Federal Regulations (CFR), Title 21, Part 312, U.S. Government Printing Office, Washington, DC, 2003.
3. Guidance for Industry: Formal Meetings With Sponsors and Applicants for PDUFA, Products, 2000, http://www.fda.gov/cber/guidelines.htm.
4. CDC, 2003, http://www.bt.cdc.gov/agent/agentlist-category.asp.