“…Twenty studies were conducted in the United States, 14–33 13 were performed in Canada, 34–46 three took place in Australia, 47–49 and two were conducted in Taiwan 50,51 . Thirty‐three studies involved resident physicians, 15,17–23,25–32,34–47,49,50 four studies involved medical students, 14,16,24,33 and one did not report the learner level 48 . Twenty‐two were prospective studies, 14,16,17,22–28,30,31,33,37,38,40–42,46–48,51 nine were retrospective, 18–20,32,35,39,44,45,50 five were qualitative studies, 21,29,34,43,49 and two were descriptive studies 15,36 .…”