Changes in adverse event rates in hospitals over time: a longitudinal retrospective patient record review study.

Baines, R.J., Langelaan, M., Bruijne, M.C. de, Asscheman, H., Spreeuwenberg, P., Steeg, L. van de, Siemerink, K.M., Rosse, F. van, Broekens, M., Wagner, C. Changes in adverse event rates in hospitals over time: a longitudinal retrospective patient record review study. BMJ Quality & Safety: 2013, 22(4), 290-298