Primary reporting-standard paper: d1xe7tfg0uwul9.cloudfront.net/cbc-portal/wp-content/uploads/2013/07/012009-JVSIII.pdf . Robert B. Rutherford and colleagues, Journal of Vascular Surgery 26, 517–538 (1997). Original p. 517 byline directly verifies Robert B. Rutherford. Printed pp. 524–525 distinguish failed/failing grafts and primary, assisted primary and secondary patency; pp. 525 onward discuss time-dependent patency estimation. No current treatment recommendations are inferred.