Layton JB, Hansen MK, Jakobsen CJ, Kshirsagar AV, Andreasen JJ, Hjortdal VE, Rasmussen BS, Simpson RJ, Brookhart MA, Christiansen CF. Statin initiation and acute kidney injury following elective cardiovascular surgery: a population cohort study in Denmark. Eur J Cardiothorac Surg. 2016 Mar;49(3):995-1000. doi: 10.1093/ejcts/ezv246
Poole WK, Pollack M, Rapoport I, Williams V, Koch MA, Rao AV, Bartel DA. Use of Multivariate Methods in Quantifying the Variability in the Perception of Neonatal Intensive Care Unit Characteristics in Nine Hospitals in the Washington, DC Area: the NIH-DC Initiative to Reduce Infant Mortality in Minority Populations in the District of Columbia. Interstat. 2002 Jan 1.