Clinical study of low ⁃ dose rt ⁃ PA combined with transcranial Doppler ultrasonography assisted intravenous thrombolysis - YUAN Chang⁃hong; WU Xiao⁃yu; CHEN Chang⁃chun; WANG Shu⁃pei; LI Xi; JIANG Yan⁃liu; ZHANG Lu; ZHANG Wei (Chinese Journal of Contemporary Neurology and Neurosurgery, 2021)