Macchi, C <br/><br/>
The circle of Willis in healthy older persons.  [electronic resource] 

 -  The Journal of cardiovascular surgery  Dec 2002 
 - 887-90 p.  digital 
<br/><br/> Publication Type: Comparative Study; Journal Article 
<br/><br/><label>ISSN: </label>0021-9509 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Age Factors<br/>Aged<br/>Aged, 80 and over<br/>Aging--physiology<br/>Carotid Stenosis--diagnosis<br/>Cerebrovascular Circulation--physiology<br/>Circle of Willis--anatomy & histology<br/>Cohort Studies<br/>Female<br/>Humans<br/>Magnetic Resonance Angiography<br/>Male<br/>Prospective Studies<br/>Reference Values<br/>Risk Assessment<br/>Sensitivity and Specificity<br/>Sex Factors<br/>Stroke--diagnosis