Multicenter Study

On-pump versus off-pump coronary artery bypass surgery in patients with preoperative anemia.

J. Thorac. Cardiovasc. Surg. 2015 Apr 1;149(4):1018-26.e1.
Multicenter Study

Impact of preoperative anemia on outcome in patients undergoing coronary artery bypass graft surgery.

Circulation. 2007 Jul 31;116(5):471-9.
Multicenter Study

Risk associated with preoperative anemia in cardiac surgery: a multicenter cohort study.

Circulation. 2008 Jan 29;117(4):478-84.