A validated disease severity scoring system for Fabry disease - Giannini, E H; Mehta, A B; Hilz, M J; Beck, M; Bichet, D G; Brady, R O; West, M; Germain, D P; Wanner, C; Waldek, S; Clarke, J T; Mengel, E; Strotmann, J M; Warnock, D G; Linhart, A (Mol Genet Metab, 2010)