Franklin JM, Dejene S, Huybrechts KF, Wang SV, Kulldorff M, Rothman KJ. A bias in the evaluation of bias comparing randomized trials with nonexperimental studies. Epidemiol Methods. 2017 Apr;6(1):20160018.. doi: 10.1515/em-2016-0018.
Willis TA, Hartley S, Glidewell L, Farrin AJ, Lawton R, McEachan RRC, Ingleson E, Heudtlass P, Collinson M, Clamp S, Hunter C, Ward V, Hulme C, Meads D, Bregantini D, Carder P, Foy R. Action to support practices implement research evidence (ASPIRE): protocol for a cluster-randomised evaluation of adaptable implementation packages targeting 'high impact' clinical practice recommendations in general practice. Implement Sci. 2016 Feb 29;11(25). doi: 10.1186/s13012-016-0387-5
Gallego R, Codony-Servat J, Garcia-Albeniz X, Carcereny E, Longaron R, Oliveras A, Tosca M, Auge JM, Gascon P, Maurel J. Serum IGF-I, IGFBP-3, and matrix metalloproteinase-7 levels and acquired chemo-resistance in advanced colorectal cancer. Endocr Relat Cancer. 2009 Mar;16(1):311-7. doi: 10.1677/ERC-08-0250