McLean RC, Nazarian SM, Gluckman TJ, Schulman SP, Thiemann DR, Shapiro EP, Conte JV, Thompson JB, Shafique I, McNicholas KW, Villines TC, Laws KM, Rade JJ. Relative importance of patient, procedural and anatomic risk factors for early vein graft thrombosis after coronary artery bypass graft surgery. J Cardiovasc Surg (Torino). 2011 Dec; 52(6):877-85.