Khalid A, Ahmed Mujadid Khan Burki, Ruhullah, Mustafa Bhutta, Muhammad Tayyab, Moin Iqbal. Comparison Between Sphenopalatine Ganglion Block And Greater Occipital Nerve Block in the Management of Post-Dural Puncture Headache in Patients Refractory to Oral Therapy. Pak Armed Forces Med J [Internet]. 2026 Sep. 30 [cited 2026 Sep. 30];76(5):675-9. Available from: https://www.pafmj.org/PAFMJ/article/view/13253