Search results
The PRISMA flow diagram of search results is shown in Figure 1. After
the removal of 67 duplicates, 317 studies were screened per Title and
Abstract. A total of 16 studies qualified for assessment of eligibility.
Finally, 1 study 18 was excluded according to the
exclusion criteria, while 15 studies 7,8,19–31 were
found eligible for qualitative and quantitative analysis including 380
acne vulgaris patients under systematic isotretinoin.