“…One study (Bonnes et al, 2017) scored ten, four scored eight (Belfi et al, 2017;Boysen-osborn et al, 2016;Heitz et al, 2015;Rui et al, 2017), two scored seven (Connor et al, 2016;Gillispie, 2016) Baig, 2009) and one scored five (Evans et al, 2016). Whilst overall performance on study end point, unbiased assessment and clear aims were good, no studies undertook prospective power calculations and with the exception of two studies (Bonnes et al, 2017;Boysen-osborn et al, 2016), loss to follow up or failure to report total number of students completing examinations was high. A prospective design was undertaken by six of the eleven studies (Belfi et al, 2017;Bonnes et al, 2017;Connor et al, 2016;Gillispie, 2016;Heitz et al, 2015;Rui et al, 2017).…”