Strengths and limitations
One obvious limitation of this study is that the study group was composed of medical students and not surgical residents. Thus, whether the results are transferable between these groups remain unanswered. Second, the amount of time to practice may be an additional limitation with respect to how the subjects would perceive their training, regardless of the presence of a supervisor or not. Previous studies, however, have shown that only a few trials are needed to reach an acceptable level of proficiency [