He seems to think that experimental medicine drives medical tourism. It does not. The American Journal of Medicine says so. This is a peer reviewed journal and is very credible. He should know this if he is in the field of medicine. So on one hand you have deceptive opining on a subject that he is vaguely familiar with and on the other you have a highly credible peer reviewed journal. If you go back to your science education, which would you rely on to support your thesis?