Ho, A M-H <br/><br/>
Understanding immortal time bias in observational cohort studies.  [electronic resource] 

 -  Anaesthesia  Feb 2013 
 - 126-30 p.  digital 
<br/><br/> Publication Type: Editorial 
<br/><br/><label>ISSN: </label>1365-2044 
<br/><br/><label>Standard No.: </label>10.1111/anae.12120  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Bias<br/>Cohort Studies<br/>Humans<br/>Kaplan-Meier Estimate<br/>Observation--methods<br/>Proportional Hazards Models<br/>Survival Analysis<br/>Time