Graduate medical education.
D002170:Canada; D004503:Education, Medical, Graduate / Q000706:statistics & numerical data*; D005006:Ethnicity / Q000706:statistics & numerical data; D005260:Female; D006801:Humans; D007396:Internship and Residency; D008297:Male; D008511:Medicine / Q000706:statistics & numerical data*; D010021:Osteopathic Medicine / Q000193:education; D013038:Specialization; D014481:United States