@article {Evans2014,
	title = {Association between beta-interferon exposure and hospital events in multiple sclerosis},
	journal = {Pharmacoepidemiology and drug safety},
	volume = {23},
	number = {11},
	year = {2014},
	pages = {1213{\textendash}1222},
	publisher = {Wiley Online Library},
	doi = {10.1002/pds.3667},
	author = {Evans, Charity and Zhu, Feng and Kingwell, Elaine and Shirani, Afsaneh and Kop, Mia L and Petkau, John and Gustafson, Paul and Zhao, Yinshan and Oger, Joel and Tremlett, Helen}
}
