“…Our search strategy identified 5,203 unique articles of which 26 were selected for full-text review. Of these, one clinical study 11 and 17 simulation studies (11 RCTs 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 and 6 non-RCTs 11 , 23 , 24 , 25 , 26 , 27 , 28 ) were included ( Table 1 ). In the case of studies comparing different types of PPE, meta-analysis was not performed because the types of PPE varied widely between studies.…”