Wu W, Cheng Y, Li Y, Jiang J, et al. Assessment of primary collateral grades based on the integrity of Willis' circle:
predicting the prognosis of acute intracranial internal carotid artery occlusion
before thrombectomy. World Neurosurg 2022 Sep 7. pii: S1878-8750(22)01249.
PMID: 36087913