Clinical Benefit and Safety of Microneedle Patches Composed of Magnesium: A Pilot Study in Acne Patients

Table 1

Korean Acne Grading System (reference [17]).

Grade	Characteristics
1	Papules ≤10
2	Papules 11–30
3	Papules ≥31, nodules ≤10
4	Nodules 11–20, ±mild ongoing scars
5	Nodules 21–30, ±moderate ongoing scars
6	Nodules ≥31, ±severe ongoing scars, ±sinus tract