[1] Univ Leipzig, Leipzig, Germany
[2] Medtronic GmbH, D-01796 Pirna, Germany
[3] Marienkrankenhaus Soest gGmbH, D-59494 Soest, Germany
[4] Private Med Univ, Univ Inst Preventat & Rehabilitat Sports Med, A-5020 Salzburg, Austria
[5] Herzzentrum Leipzig, D-04289 Leipzig, Germany