Assessment of safety and efficacy of mesenchymal stromal cell therapy in preclinical models of acute myocardial infarction: a systematic review protocol oleh Carly C. Barron, Manoj M. Lalu, Duncan J. Stewart, Dean Fergusson, Homer Yang, David Moher, Peter Liu, David Mazer, P. J. Devereaux, Lauralyn McIntyre, On Behalf of the Canadian Perioperative Anesthesia Clinical Trials Group