1. Comparison of bovine and porcine heparin in heparin antibody formation after cardiac surgery 
John L Francis, PhD, George J Palmer, MD, Rebecca Moroose, MD, Alane Drexler, MS 
The Annals of Thoracic Surgery 
Volume 75, Issue 1, Pages (January 2003)
DOI: /S (02)

2. Fig 1
Time course of heparin-PF4 antibody formation after coronary artery bypass grafting. Results are expressed as the percentage of the total number of patients receiving either bovine or porcine heparin who developed a positive antibody test at each time point. Day 0 = preoperative.
The Annals of Thoracic Surgery  , 17-22DOI: ( /S (02) )

3. Fig 2
Platelet counts (mean ± SD) after coronary artery bypass grafting in patients positive or negative for a heparin-PF4 antibody (a) and patients randomized to bovine or porcine heparin (b). Day 0 = preoperative.
The Annals of Thoracic Surgery  , 17-22DOI: ( /S (02) )

4. Fig 3
Platelet counts (mean ± SD) after coronary artery bypass grafting in patients having cardiopulmonary bypass (CPB) or off-pump coronary artery bypass (OPCAB) surgery. Day 0 = preoperative.
The Annals of Thoracic Surgery  , 17-22DOI: ( /S (02) )