Associations between homocysteine and stroke severity and extracranial and intracranial arteriostenosis in stroke patients 
Yang Yingliang, Xu Yingzhi, Liu Guiyan, Wang Quanliang
International Medicine and Health Guidance News . 2022, (8): 1142 -1146 .  DOI: 10.3760/cma.j.issn.1007-1245.2022.08.025