OFP-13-002 The impact of ventricular assist device prior to transplantation on acute cellular rejection and antibody-mediated rejection in cardiac allografts with due consideration of seasonal behaviour: A prospective study K. Wassilew * , E. Potapov, C. Knosalla, T. Krabatsch, M. Hummel, R. Hetzer * Deutsches Herzzentrum Berlin, Germany