I worked with Janice Hadlock for six months the year following my initial diagnosis. I found her very personable with a wide knowledge of some aspects of pd. However, I believe her theory that pd is caused by the reversal of chi flow due to an ankle/foot injury early in life is an extremely improbable hypothesis. As we know, there are many possible causes of the disease and many ways that it presents. To try to shoe horn it into one over-arching therapeutic system is at the least mis-guided and perhaps disingenuous. If her approach worked, there would be many many more people singing her praises.