Yumul, Roya, Ahdout, Julianne, Goodman, Ariana, Elvir Lazo, OFELIA, Hernandez Conte, Antonio, Cook-Wiens, Galen, Cao, Xuezhao, AND White, Paul. " Assessment Of Preoperative Anxiety Using Visual Facial Anxiety Scale: An Alternative To The Verbal Rating Scale?" Medical Research Archives [Online], Volume 2 Number 2 (21 July 2015)