Eight Extraordinary Channels-Qi Jing Ba Mai: A Handbook for Clinical Practice and Nei Dan Inner Meditation
David Twicken, DOM, L.Ac. is a licensed practitioner and professor of Chinese medicine. He teaches Qi Gong, Tai Chi Chuan, Nei Dan, feng shui and Chinese astrology. He has studied Chinese healing arts for 30 years. He resides in Los Angeles, California.