Effects of off-pump versus on-pump coronary surgery on reversible and irreversible myocardial injury: a randomized trial using cardiovascular magnetic resonance imaging and biochemical markers. - Selvanayagam,J.B.; Petersen,S.E.; Francis,J.M.; Robson,M.D.; Kardos,A.; Neubauer,S.; Taggart,D.P. (Circulation, 2004)