1. Fracture risk with use of liver enzyme inducing antiepileptic drugs in people with active epilepsy: Cohort study using the General Practice Research Database 
Jennifer M. Nicholas, Leone Ridsdale, Mark P. Richardson, Andy P. Grieve, Martin C. Gulliford 
Seizure - European Journal of Epilepsy 
Volume 22, Issue 1, Pages (January 2013)
DOI: /j.seizure
Copyright © 2012 British Epilepsy Association Terms and Conditions

2. Fig. 1
Definition of time-varying treatment over follow-up for an example participant.
Seizure - European Journal of Epilepsy  , 37-42DOI: ( /j.seizure )
Copyright © 2012 British Epilepsy Association Terms and Conditions