Recommended Korean dermatology clinics for acne scars treatment?

I have moderate acne scarring on my cheeks - a mix of boxcar and rolling scars. I have tried various treatments in my country but nothing has made a significant difference. I have heard that Korean dermatology clinics are very advanced in treating acne scars with lasers and other techniques. Can anyone recommend good dermatology clinics in Seoul for acne scar treatment? What treatments did you receive and how many sessions did it take to see improvement? I am planning to stay in Korea for about a month and want to maximize my treatment time. Budget is around 3-5 million won.