If you are a Canadian citizen without US green card or US citizenship then I strongly advise you to NOT apply to any international medical school.  The Canadian government has put a cap on how many Statement of Need (SON) documents that will be issued.

In order for the ECFMG to sponsor your J-1 visa, you need a SON from the Canadian government to be sent to ECFMG.  The SON is needed because after you finish your residency training or fellowship, you are to return to Canada and stay there for 2 years before you are allowed to come back to the US for a job.