“…27,33,[45][46][47][48][49][50][51] With regards to study design, most articles (i.e. 7%-50% 27,28,30,33,45,48,50 ) were cohort, six (42.86%) 29,32,44,46,49,51 were case-control, and one (7.14%) was a case report. 47 Treatment monitoring was the focus of six studies (43%), 28,33,[46][47][48][49] while the remaining 8 (57%) characterized acne lesions, unaffected skin in acne patients or both.…”