@article{Xilin Yang2014JE20130164, title={Validation of Methods to Control for Immortal Time Bias in a Pharmacoepidemiologic Analysis of Renin–Angiotensin System Inhibitors in Type 2 Diabetes}, author={Xilin Yang and Alice PS Kong and Andrea OY Luk and Risa Ozaki and Gary TC Ko and Ronald CW Ma and Juliana CN Chan and Wing Yee So}, journal={Journal of Epidemiology}, volume={24}, number={4}, pages={267-273}, year={2014}, doi={10.2188/jea.JE20130164} }