Safety of Whole-Body Vibration Exercise for Heart Transplant Recipients - Crevenna, R; Fialka-Moser, V; Rödler, S; Keilani, M; Zöch, C; Nuhr, M; Quittan, M; Wolzt, M (Physikalische Medizin, Rehabilitationsmedizin, Kurortmedizin, 2003)