Cardiovascular diseases, risk factors and short-term heart rate variability in an elderly general population: the CARLA study 2002–2006 - Greiser, K; Kluttig, A; Schumann, B; Swenne, C; Kors, J; Kuss, O; Haerting, J; Schmidt, H; Thiery, J; Werdan, K (Eur J Epidemiol, 2009)