1. Gilbertson, M., Kubiak, T., Ludwig, J. & Fox, G. J. Toxicol. Environ. Health 33, 455–520 (1991).
2. Masuda, Y. in Dioxins and Health Vol. 1 (ed. Schecter, A.) 633–659 (Plenum, New York, 1994).
3. Kohanawa, M., Shoya, S., Yonemura, T., Nishimura, K. & Tsushio, Y. Natl Inst. Anim. Health Q. Tokyo 9, 220–228 (1969).
4. Harris, J. R. & Rose, L. J. Am. Vet. Med. Assoc. 161, 1584–1586 (1972).
5. Papke, O. Environ. Health Perspect. 106 (suppl. 2), 723–731 (1998).