1. NIH Consensus Development Program. Acupuncture-consensus development conference statement. National Institutes of Health: 3–5 Nov 1997.
2. Ma K. The roots and development of Chinese acupuncture: from prehistory to early 20th century. Acupunct Med. 1992;10(Suppl):92–9.
3. Robson T. An introduction to complementary medicine. Sydney: Allen & Unwin; 2004. p. 9.
4. Prioreschi P. A history of medicine. vol. 2. Omaha: Horatius Press; 2004. pp. 147–8.
5. Barnes LL. Needles, herbs, gods, and ghosts: China, healing, and the West to 1848. Cambridge: Harvard University Press; 2005.