U. Boeken, J. P. Minol, A. Assmann, A. Mehdiani, P. Akhyari, and A. Lichtenberg, “Readmission to the Intensive Care Unit in Times of Minimally Invasive Cardiac Surgery: Does Size Matter?”, HSF, vol. 17, no. 6, pp. E296-E301, Jan. 2015.