I was able to find a study that was done by comparing women of low income from Mexico to women from Southern California. They ... I was able to find a study that was done by comparing women of low income from Mexico to women from Southern California. They ... were able to find that there were higher percentages of women in Mexico suffering from pica compared to those in the United ... were able to find that there were higher percentages of women in Mexico suffering from pica compared to those in the United ...