Meena K, S R, Swain L, Goyal SK. Prolongation of subarachnoid block for prolapsed intervertebral disc surgery by intra-operative subdural injection under direct vision. apic [Internet]. 26Jan.2019 [cited 3Jul.2024];:62-4. Available from: https://apicareonline.com/index.php/APIC/article/view/315