Ibrahim, K., Tjomsland, O., Halvorsen, D., Wiseth, R., Wahba, A., Karevold, A. and Haaverstad, R. (2006) “Effect of Clopidogrel on Midterm Graft Patency following Off-Pump Coronary Revascularization Surgery”, The Heart Surgery Forum, 9(6), pp. E581-E856. doi: 10.1532/HSF98.20061034.