Cost of illness and its predictors for Parkinson’s disease in Germany - Spottke, AE; Reuter, M; Machat, O; Bornschein, B; von Campenhausen, S; Berger, K; Koehne-Volland, R; Rieke, J; Simonow, A; Brandstaedter, D; Siebert, U; Oertel, WH; Ulm, G; Dodel, R (Pharmacoeconomics, 2005)