Electrocardiographic characteristics of trained and untrained standardbred racehorses oleh Sarah D. Nissen, Rikke Weis, Elisabeth K. Krag‐Andersen, Eva M. Hesselkilde, Jonas L. Isaksen, Helena Carstensen, Jørgen K. Kanters, Dominik Linz, Prashanthan Sanders, Charlotte Hopster‐Iversen, Thomas Jespersen, Steen Pehrson, Rikke Buhl