6HijdraA,B ronwersP I,V ermeulen M,et al. Grading the amount of blood on computed tomagTam safter subara chnoid hemorrhage [J].Stroke,1990,21(8): 1156-1161.
7Hijdra A, Bronwers PL, Vermeulen M, et al. Grading the amount of blood on computed tomograms after subarachnoid hemorrhage [J]. Stroke,1990,21 (8) :1156 - 1161.