Check out http://www.micropsi.com/publications/publications.html, e.g., http://www.micropsi.com/publications/assets/BachVuineMates20... or one of the more recent publications for a written explanation.
Check out http://www.micropsi.com/publications/publications.html, e.g., http://www.micropsi.com/publications/assets/BachVuineMates20... or one of the more recent publications for a written explanation.