“…Two studies compared different curriculums or didactic methods (Shirazi et al ., 2009; Li et al ., 2015), but only one found significant group differences (Li et al ., 2015). Several studies showed a statistically significant change in total scores or subscales of questionnaires (da Silva Cais et al ., 2011; Wang et al ., 2012; Li et al ., 2014 a ; Li et al ., 2015; Hofmann-Broussard et al ., 2017), but these results must be interpreted with caution due to risk of bias.…”