Evaluation of Clinical and Ultrasound Changes With the Use of Microneedling Versus Fractional CO2 Laser in Atrophic Acne Scars. Dermatol Pract Concept [Internet]. 2024 Jul. 31 [cited 2025 Jan. 21];14(3):e2024168. Available from: https://www.dpcj.org/index.php/dpc/article/view/4062