BibTex format
@inproceedings{Tsilidis:2014:10.1158/1538-7445.AM2014-2161,
author = {Tsilidis, KK and Capothanassi, D and Allen, N and Rizos, E and Lopez, D and van, Veldhoven K and Sacerdote, C and Ashby, D and Vineis, P and Tzoulaki, I and Ioannidis, J},
doi = {10.1158/1538-7445.AM2014-2161},
publisher = {AMER ASSOC CANCER RESEARCH},
title = {Metformin and cancer risk: A cohort study in the UK Clinical Practice Research Datalink analyzed like a randomized trial},
url = {http://dx.doi.org/10.1158/1538-7445.AM2014-2161},
year = {2014}
}