 - Any topical, intralesional therapy or procedure applied within 2 cm of the treatment area, within 4 weeks of randomisation, which in the opinion of the investigator, could interfere with the trial assessments. This includes, but is not limited to: corticosteroids, calcineurin inhibitors, calcipotriol, minoxidil, antimicrobials, prostaglandin analogs e.g. bimatoprost, herbal extracts, topical immunotherapy with allergens or irritants and any laser or phototherapy, and eyebrow tattoo. 