My father has had this illness for over 15 years, we have taken him to every doctor you can think of, my family and i are very desperate to find a cure. My dad has very sirious vomiting its very strong when he first got sick whe thought it was the food then we saw that he would get sick every 3 months then it changed to every month and know he is getting sick every week. This is very alarming to us because he is unable to eat anything and he is loosing weight rapidly we need help. No doctor has giving us a diagnostic what do you think?