Munavalli 2011.

Methods	A pilot RCT
Participants	12 patients (Fitzpatrick skin types II–V) with moderate to severe acne scarring
Interventions	A vacuum‐assisted radiofrequency (RF) device was randomised to one side, with contralateral side as control
Outcomes	Unlabeled baseline and 6‐month photography were evaluated by a blinded, non‐treating physician assessor using a quartile grading scale to denote improvement
Notes	Abstract only. Abstract does not contain enough information for 'Risk of bias' assessment and completion of the Characteristics of included studies table