Haider, S. Z., Khan, R. A. S. ., Iqbal, M. R., Irum Noor, Muhammad Huzaifa Shareef, & Abid Khan. (2026). Efficacy of Greater Occipital Nerve Block in Treatment and Prevention of Chronic Migraine. Pakistan Armed Forces Medical Journal, 76(5), 623-627. https://doi.org/10.51253/pafmj.v76i5.11111