Exaggeration of wrinkles after botulinum toxin injection for forehead horizontal lines.
Kang SM, Feneran A, Kim JK, Park O, Kim JE, Won CH, Chang S, Lee MW, Choi JH, Moon KC, Youn CS, Cho S, Lee SH. Exaggeration of wrinkles after botulinum toxin injection for forehead horizontal lines. Ann Dermatol. 2011 May; 23(2):217-21.