AU - Akpınar, Ahmet TI - Effects of Greater Occipital Nerve Block on Headache Frequency and Sleep Disturbance in Medication Overuse Headache PT - Journal Article DP - 2026 TA - Bosphorus Med J PG - 63-68 VI - 13 IP - 2 AID - 10.14744/bmj.2026.55822 [doi] 4100 - https://dx.doi.org/10.14744/bmj.2026.55822 SO - Bosphorus Medical Journal, 2026 13(2):63