AU - Winn BJ, Sires BS TI - ELectromyographic differences between normal upper and lower facial muscles and the influence of onabotulinum toxin a PT - JOUR DP - 2013 TA - JAMA Facial Plastic Surgery pages = {211-217}, VI - 15 IP - 3 AID - 10.1001/jamafacial.2013.692 [doi] 4100 - http://dx.doi.org/10.1001/jamafacial.2013.692 SO - JAMA Facial Plastic Surgery May 1, 2013 15(3):211