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2. Animal Medicinal Drug Use Clarification Act of 1994, http://www.fda.gov/cvm/amducatoc.htm.
3. http://www.agri.gov.cn/blgg/t20021022_16454.htm.
4. http://www.mhlw.go.jp/english/topics/foodsafety/positivelist060228/index.html.
5. IARC Monographs on the Evaluation of Carcinogenic Risks to Humans, Overall Evaluations of Carcinogenicity, Supplement 7, 1987.