A Clinical Study to Compare 25 G Whitacre and Quincke Spinal Needles for Incidence of Post Dural Puncture Headache (PDPH) and Failed Spinal Anaesthesia. IJPHRD [Internet]. 2020 May 18 [cited 2026 Jun. 10];11(5):216-20. Available from: https://medicopublication.com/index.php/ijphrd/article/view/9321