Ellis, CN, DR Pennes, W Martel, and JJ. Voorhees. “Radiographic Bone Surveys After Isotretinoin Therapy for Cystic Acne”. Acta Dermato-Venereologica 65, no. 1 (January 1, 1985): 83–85. Accessed June 28, 2026. https://medicaljournalssweden.se/actadv/article/view/6861.