DAN has an extensive database of all the studies the conduct on line and they have been running the on line seminars for a while now. When it comes to medical conditions there are just to many variables to take into consideration as everyone is an individual and there can be other underlying conditions that would aggrevate the primary condition. Not to mention the persons willingness to be forth coming with their entire medical history even with a doctor.Without a complete picture its difficult to make an informed decision as to the best interest of you and the student.