N. Shahzadi, S. Atif, and A. Arshad, “Techniques of using botulinum toxin for forehead wrinkles: A narrative review”, Pak J Med Surg Aesthet, vol. 1, no. 1, pp. 26–35, May 2025, Accessed: Jun. 03, 2025. [Online]. Available: https://www.pjmsa.com/index.php/pjmsa/article/view/21