I found a study titled, "INDIGENOUS WOMEN HEALERS FORMED GROUPS TO PRACTICE TRADITIONAL MEDICINE IN OAXACA (MEXICO)." This is especially interesting to me because I have a friend who is a Choctaw Holy Man. Having been his roommate for the better portion of a year, I was able to learn a great deal from him. I learned that yarrow can stop bleeding and that tension points on a person's back can be worked out to get rid of headaches. Frequently, I find myself using what he taught me.