1 Faculty of Health Sciences Brandenburg, Brandenburg Medical School Theodor Fontane, Neuruppin, Germany (S.K., N.P.).
2 Department of Cardiac Surgery, Kerckhoff-Clinic, Bad Nauheim, Germany (M.R.).
3 Department of Internal Medicine and Cardiology, University Hospital Ruppin-Brandenburg, Medical School Theodor Fontane, Neuruppin, Germany (F.K., N.P.).
4 Medical Department II, Marien Hospital Herne, Ruhr University Bochum, Germany (B.S.).
5 University of Texas Southwestern Medical Center, Dallas (T.K.).