Too heavy handed... You need to consult the AAMC MD/PhD spreadsheet that indicate which schools consider/support international applications. URiM is used for US citizens/PR because the NIH has an interest on diversity, but their interest is limited to those groups, not international applicants.
AAMC website:
MD-PhD programs provide training in both medicine and research. They are specifically designed for those who want to become research physicians.
students-residents.aamc.org
You must also look at the AAMC FACTS table 8 to learn the number of applicants and matriculants to each of those schools. For example, Dartmouth had 333 applicants and 2 matriculants. That is a highly competitive ratio, whereas for example, VCU had 187 applicants and 8 matriculants.
See:
These FACTS tables present data on U.S. medical school enrollments and graduates, and data on MD-PhD students.
www.aamc.org