Medical Tourism information provided by National Center for Policy Analysis (NCPA) reveals that healthcare suppliers and medical travel mediators overseas also compete on quality by advertising their medical team's qualifications. These doctors are usually certified by U.S. boards, whereas others have educational certificates which are recognized worldwide. Most of the doctors who treat medical tourists are trained in the United States, Australia, Canada or Europe. The US Government promotes cultural-exchange programs from Southeast Asia and the Middle East, as a majority of physicians from these countries are educated and trained in US universities and hospitals. Several American medical schools are unable to rapidly produce sufficient graduates to fill the available internships and residencies, as a result, approximately 9,500 overseas doctors are employed in US hospitals, especially when these hospitals are understaffed (Source: Health-Tourism).