Hungarian results of the IMPROVEMENT HF European survey on the everyday diagnostics and treatment of heart failure: Comparison of European and Hungarian data by Préda, I, Cleland, J, Cosin-Aguilar, J, Cohen-Solal, A, Dietz, R, Follath, F, Freemantel, N, Gavazzi, A, Hobbs, R, Korewicki, J, Madeira, H, Swedberg, K, Van Gilst, W, Widimsky, J