The multicentric randomized study of dl-3-butylphthalide in the treatment of acute moderate ischemic strokeCUI Li-ying, LI Shun-wei, LU Chuan-Zhen, DONG Qiang, DONG Peng, SHI Lang-feng, HUANG Jian-zheng, MAO Shan-ying, ZHANG Chao-dong, CAO Yun-peng, NIE Ying-xue, WANG Wei-zhi, Liang Qing-cheng, YANG Xiao-chun, DONG Wei-wei, LI Guang-qin, Peng Guo-guang, Luo Zu-ming, HE Li, WAN Qi, HAN Jun-liang, Huang Ru-xun, LI Ling, Li Cheng-yan, MENG Zhen-zhong