Depression worsens outcomes in elderly patients with heart failure: An analysis of 48,117 patients in a community setting - Macchia, Alejandro; Monte, Simona; Pellegrini, Fabio; Romero, Marilena; D'Ettorre, Antonio; Tavazzi, Luigi; Tognoni, Gianni; Maggioni, Aldo P. (European Journal of Heart Failure, 2008)