Yumul, R., Ahdout, J., Goodman, A., Elvir Lazo, O., Hernandez Conte, A., Cook-Wiens, G., Cao, X., & White, P. (2015). Assessment Of Preoperative Anxiety Using Visual Facial Anxiety Scale: An Alternative To The Verbal Rating Scale?. Medical Research Archives, 2(2). Retrieved from https://esmed.org/MRA/mra/article/view/281