AU - Kuehn BM TI - FDa requires black box warnings on labeling for botulinum toxin products PT - JOUR DP - 2009 TA - JAMA pages = {2316}, VI - 301 IP - 22 AID - 10.1001/jama.2009.780 [doi] 4100 - http://dx.doi.org/10.1001/jama.2009.780 SO - JAMA June 10, 2009 301(22):2316