Brockbank J, Wolowacz S. Economic evaluations of new oral anticoagulants for the prevention of venous thromboembolism after total hip or knee replacement: a systematic review. Pharmacoeconomics. 2017 May;35(5):517-35. doi: 10.1007/s40273-017-0486-4
Schneeweiss S, Rassen JA, Glynn RJ, Myers J, Daniel GW, Singer J, Solomon DH, Kim SY, Rothman KJ, Avorn J. Supplementing claims data with outpatient laboratory test results to improve confounding adjustment in effectiveness studies of lipid-lowering treatments. BMC Med Res Methodol. 2012 Nov 26;12(11):180.