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@Misc{beamsposter,
author = {Shirani, A.  and Zhao, Y. and Karim, M.E. and Evans, C. and Kingwell, E. and van der Kop, M. and Oger, J. and Gustafson, P. and Petkau, J. and  Tremlett, H.},
title = {Association between use of interferon beta and progression of disability in patients with relapsing-remitting multiple sclerosis.},
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year = 2012
}


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@unpublished{beamsIPTW,
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@PhdThesis{karimthesis,
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          author = {Karim, M. E.},
          school = {University of British Columbia, Vancouver},
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}


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title = {A simulation study of the performance of the prescription time-distribution matching method to address immortal time bias},
note = {Session on Causal Inference in Epidemiology, Section on Statistics in Epidemiology, Presentation at Joint Statistical Meetings, San Diego, California, July 28-August 2},
year = 2012
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@Misc{karim13jsm,
author = {Karim, M. E. and Gustafson, P. and Petkau, J. and Shirani,A. and Zhao, Y. and  Kingwell, E. and Evans, C. and van der Kop, M. and Oger, J. and and Tremlett, H.},
title = {Logrank tests with the inverse probability of treatment weighting to assess the impact of beta-interferon treatments in delaying disability progression in multiple sclerosis},
note = {Session on Causal Methods and Applications in Variable Selection, Genetics, Mediation and Survival Analysis, Section on Statistics in Epidemiology, Presentation at Joint Statistical Meetings, Montr{\'e}al, Qu{\'e}bec, August 3-8},
year = 2013
}

@Misc{karim13ssc,
author = {Karim, M. E. and Gustafson, P. and Petkau, J. and Shirani,A. and Zhao, Y. and  Kingwell, E. and van der Kop, M. and Oger, J. and and Tremlett, H.},
title = {{A simulation study of methods used to reduce variability in the inverse probability of treatment weights for marginal structural Cox models}},
note = {Annual Meeting of the Statistical Society of Canada, University of Alberta, Edmonton, Alberta, May 26-29},
year = 2013
}

@Misc{karim13sscst,
author = {Karim, M. E. and Gustafson, P. and Petkau, J. and Shirani,A. and Zhao, Y. and  Kingwell, E. and Evans, C. and van der Kop, M. and Oger, J. and and Tremlett, H.},
title = {{Comparing the direct and approximate approaches to implement marginal structural Cox models: An Application to Multiple Sclerosis}},
note = {Inaugural SSC Student Conference, University of Alberta, Edmonton, Alberta, May 25},
year = 2013
}


@Misc{karim12stata,
author = {Karim, M. E. and Gustafson, P. and Petkau, J.},
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note = {Presentation at Stata Conference, San Diego, July 26-27},
year = 2012}

@misc{karim11jsm,
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    year     = {2011},
    note     = {Section on Statistics in Epidemiology, Presentation at Joint Statistical Meetings, 30 July-4 August, Miami Beach, Florida},
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@article{robins1987graphical,
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@article{robins1989analysis,
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@article{robins1995analysis,
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@article{robins1997causal,
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@inproceedings{robins1998msm,
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  booktitle={{Proceedings of the American Statistical Association, Section on Bayesian Statistical Science}},
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  year={1997},
  publisher={American Statistical Association}
}

@article{robins1998structural,
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@article{robins1998correction,
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@article{robins1999sensitivity,
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  year={1999},
  publisher={NY: Springer-Verlag}
}

@article{robins1999estimation,
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@article{jambs1999marginal,
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@article{robins2000marginal,
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