Article 2 acetylsalicylic acid 2 aged 2 carotid artery obstruction 2 carotid endarterectomy cerebrovascular accident 2 coronary artery disease 2 female 2 follow up 2 human 2 hyperlipidemia 2 major clinical study 2 male 2 peripheral occlusive artery disease 2 Aged 1 CHADS2 score 1 Carotid Stenosis 1 Carotid stenosis 1 Cerebrovascular disorders 1 Dose-Response Relationship, Radiation 1 EuroSCORE 1 Female 1 Head and Neck Neoplasms 1 Head and neck neoplasms 1 Humans 1 Male 1 Middle Aged 1 Mortality 1 National Institutes of Health Stroke Scale 1 Radiation effects 1