“…It is important to consider the limitation of all studies included in this review, including pre‐intervention (eg, confounding, selection), peri‐intervention (eg, classification), and post‐intervention (eg, reporting) bias. Eight studies 7,8,18,19,21,22,29,31 were critically biased due to the inherent limitations of case reports and expert opinions of selective reporting and negative self‐controls. The remainder were moderately biased, due to no pre‐registered protocols, variable isotretinoin dosages and laser settings, and the subjective nature of outcome measures.…”