Brennen Bittel, Kathrin Husmann. A Case Report of Thunderclap Headache with Sub-arachnoid Hemorrhage and Negative Angiography: A Review of Call-Fleming Syndrome and the use of Transcranial Dopplers in Predicting Morbidity. JVIN [Internet]. 2023 Nov. 12 [cited 2026 Jun. 19];4(2). Available from: https://ojs.jvin.org/index.php/jvin/article/view/316