Marginal structural Cox models for estimating the association between beta-interferon exposure and disease progression in a multiple sclerosis cohort ME Karim, P Gustafson, J Petkau, Y Zhao, A Shirani, E Kingwell, C Evans, M {Van Der Kop}, J Oger, H Tremlett January 2014 PDF Code Source Document marginal-structural-model causal-inference multiple-sclerosis longitudinal-data observational-data DAG survival-analysis Related Investigation of heterogeneity in the association between interferon beta and disability progression in multiple sclerosis: an observational study Interferon beta and long-term disability in multiple sclerosis Association between use of interferon beta and progression of disability in patients with relapsing-remitting multiple sclerosis Can joint replacement reduce cardiovascular risk?