Final answer:
Extra billing by doctors and user fees levied by hospitals are the main concerns regarding the accessibility of health care in Canada.
Step-by-step explanation:
The main concern regarding the accessibility of health care in Canada is extra billing by doctors and user fees levied by hospitals.
Extra billing refers to when doctors charge patients more than the amount reimbursed by the provincial health insurance plan, which creates a financial burden for the patients. User fees, on the other hand, are charges imposed by hospitals for certain services, such as emergency room visits or hospital stays.
These practices create a two-tiered system where those who can afford to pay extra receive faster access to care, while those who cannot afford additional costs may face delays or barriers in accessing necessary medical treatments.