Hoonhout, L.H.F., Bruijne, M.C. de, Wagner, C., Zegers, M., Waaijman, R., Spreeuwenberg, P., Asscheman, H., Wal, G. van der, Tulder, M.W. van. Direct medical costs of adverse events in Dutch hospitals. BMC Health Services Research: 2009, 9(27)