Percutaneous Unloading of the Left Ventricle during Extracorporeal Membrane Oxygenation in Cardiogenic Shock - Ongoing Experience from a High-volume Centre - Schrage, B.; Becher, M.; Schwarzl, M.; Grahn, H.; Bernhardt, A.; Blankenberg, S.; Reichenspurner, H.; Westermann, D. (The Thoracic and Cardiovascular Surgeon, 2018)