Zacharatos H, Hassan AE, Vazquez G, Hussein HM, Rodriguez GJ, Suri MF, Lakshminarayan K, Ezzeddine MA, Qureshi AI. Comparison of acute nonthrombolytic and thrombolytic treatments in ischemic stroke patients 80 years or older. Am J Emerg Med. 2012 Jan; 30(1):158-64.