External validation of the Boston Acute Stroke Imaging Scale and M1-BASIS in thrombolyzed patients. by Yeo, L, Paliwal, P, Wakerley, B, Khoo, C, Teoh, H, Ahmad, A, Ting, E, Seet, R, Ong, V, Chan, B, Yohanna, K, Gopinathan, A, Rathakrishnan, R, Sharma, V